diff --git a/checkpy3.sh b/checkpy3.sh
index 1dbaff4e6..e03529b64 100755
--- a/checkpy3.sh
+++ b/checkpy3.sh
@@ -1,5 +1,5 @@
 cp gpkit/env/settings .
 sed -i '1s/.*/installed_solvers : mosek_cli/' gpkit/env/settings
 cat gpkit/env/settings
-python3 -c "import gpkit.tests; gpkit.tests.helpers.run_tests(gpkit.tests.t_examples.TESTS)"
+python3 -c docs/source/examples/simpleflight.py
 mv settings gpkit/env
diff --git a/docs/source/autodoc/gpkit.constraints.rst b/docs/source/autodoc/gpkit.constraints.rst
index b2b09369f..37e84ae57 100644
--- a/docs/source/autodoc/gpkit.constraints.rst
+++ b/docs/source/autodoc/gpkit.constraints.rst
@@ -28,18 +28,10 @@ gpkit.constraints.costed module
     :undoc-members:
     :show-inheritance:
 
-gpkit.constraints.geometric_program module
-------------------------------------------
+gpkit.constraints.gp module
+---------------------------
 
-.. automodule:: gpkit.constraints.geometric_program
-    :members:
-    :undoc-members:
-    :show-inheritance:
-
-gpkit.constraints.linked module
--------------------------------
-
-.. automodule:: gpkit.constraints.linked
+.. automodule:: gpkit.constraints.gp
     :members:
     :undoc-members:
     :show-inheritance:
@@ -76,18 +68,18 @@ gpkit.constraints.set module
     :undoc-members:
     :show-inheritance:
 
-gpkit.constraints.sigeq module
-------------------------------
+gpkit.constraints.sgp module
+----------------------------
 
-.. automodule:: gpkit.constraints.sigeq
+.. automodule:: gpkit.constraints.sgp
     :members:
     :undoc-members:
     :show-inheritance:
 
-gpkit.constraints.signomial_program module
-------------------------------------------
+gpkit.constraints.sigeq module
+------------------------------
 
-.. automodule:: gpkit.constraints.signomial_program
+.. automodule:: gpkit.constraints.sigeq
     :members:
     :undoc-members:
     :show-inheritance:
diff --git a/docs/source/autodoc/gpkit.nomials.rst b/docs/source/autodoc/gpkit.nomials.rst
index b5212e60a..39def6397 100644
--- a/docs/source/autodoc/gpkit.nomials.rst
+++ b/docs/source/autodoc/gpkit.nomials.rst
@@ -12,6 +12,14 @@ gpkit.nomials.array module
     :undoc-members:
     :show-inheritance:
 
+gpkit.nomials.core module
+-------------------------
+
+.. automodule:: gpkit.nomials.core
+    :members:
+    :undoc-members:
+    :show-inheritance:
+
 gpkit.nomials.data module
 -------------------------
 
@@ -20,18 +28,18 @@ gpkit.nomials.data module
     :undoc-members:
     :show-inheritance:
 
-gpkit.nomials.nomial_core module
---------------------------------
+gpkit.nomials.map module
+------------------------
 
-.. automodule:: gpkit.nomials.nomial_core
+.. automodule:: gpkit.nomials.map
     :members:
     :undoc-members:
     :show-inheritance:
 
-gpkit.nomials.nomial_math module
---------------------------------
+gpkit.nomials.math module
+-------------------------
 
-.. automodule:: gpkit.nomials.nomial_math
+.. automodule:: gpkit.nomials.math
     :members:
     :undoc-members:
     :show-inheritance:
diff --git a/docs/source/autodoc/gpkit.rst b/docs/source/autodoc/gpkit.rst
index c38ddaa5f..3dba47919 100644
--- a/docs/source/autodoc/gpkit.rst
+++ b/docs/source/autodoc/gpkit.rst
@@ -3,6 +3,9 @@ Glossary
 
 *For an alphabetical listing of all commands, check out the* :ref:`genindex`
 
+gpkit package
+=============
+
 Subpackages
 -----------
 
diff --git a/docs/source/citinggpkit.rst b/docs/source/citinggpkit.rst
index d921cd71e..b61081efc 100644
--- a/docs/source/citinggpkit.rst
+++ b/docs/source/citinggpkit.rst
@@ -8,5 +8,5 @@ If you use GPkit, please cite it with the following bibtex::
           title={GPkit software for geometric programming},
           howpublished={\url{https://github.com/convexengineering/gpkit}},
           year={2017},
-          note={Version 0.5.3}
+          note={Version 0.6.0}
          }
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 5ff57e336..7bf1d53b1 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -55,9 +55,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = '0.5'
+version = '0.6'
 # The full version, including alpha/beta/rc tags.
-release = '0.5.3'
+release = '0.6.0'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/docs/source/releasenotes.rst b/docs/source/releasenotes.rst
index a7fd360c7..52a6afe87 100644
--- a/docs/source/releasenotes.rst
+++ b/docs/source/releasenotes.rst
@@ -3,6 +3,12 @@ Release Notes
 
 This page lists the changes made in each point version of gpkit.
 
+Version 0.6.0
+=============
+ * new much faster NomialMap data structure (#682)
+ * Many bug fixes and small improvements.
+ * 6900 lines of code, 2200 lines of tests, 2100 lines of docstring.
+
 Version 0.5.3
 =============
  * faster SP solves (#1109)
diff --git a/gpkit/__init__.py b/gpkit/__init__.py
index e822268d1..8476c1249 100644
--- a/gpkit/__init__.py
+++ b/gpkit/__init__.py
@@ -19,7 +19,7 @@
 from os.path import dirname as os_path_dirname
 SETTINGS_PATH = os_sep.join([os_path_dirname(__file__), "env", "settings"])
 
-__version__ = "0.5.3"
+__version__ = "0.6.0"
 UNIT_REGISTRY = None
 SIGNOMIALS_ENABLED = False
 GPBLU = "#59ade4"
diff --git a/gpkit/constraints/gp.py b/gpkit/constraints/gp.py
index 2a258e2c1..434f202f9 100644
--- a/gpkit/constraints/gp.py
+++ b/gpkit/constraints/gp.py
@@ -218,7 +218,7 @@ def _get_solver(solver):
                                 nu=solver_out["nu"], la=solver_out["la"])
         except RuntimeWarning as e:
             if warn_on_check:
-                print "Solution check warning:", str(e)
+                print("Solution check warning: %s" % e)
             else:
                 raise e
         if verbosity > 1:
diff --git a/gpkit/constraints/model.py b/gpkit/constraints/model.py
index 7ce80343e..d1dcd0636 100644
--- a/gpkit/constraints/model.py
+++ b/gpkit/constraints/model.py
@@ -151,8 +151,8 @@ def debug(self, solver=None, verbosity=1, **solveargs):
         solveargs["solver"] = solver
         solveargs["verbosity"] = verbosity - 1
 
-        print "< DEBUGGING >"
-        print "> Trying with bounded variables and relaxed constants:"
+        print("< DEBUGGING >")
+        print("> Trying with bounded variables and relaxed constants:")
 
         if self.substitutions:
             constsrelaxed = ConstantsRelaxed(Bounded(self))
@@ -183,10 +183,10 @@ def debug(self, solver=None, verbosity=1, **solveargs):
                               % (orig, mag(self.substitutions[orig]),
                                  mag(sol(orig))))
                     print
-            print ">> Success!"
+            print(">> Success!")
         except (ValueError, RuntimeWarning):
             print(">> Failure.")
-            print "> Trying with relaxed constraints:"
+            print("> Trying with relaxed constraints:")
 
             try:
                 constrsrelaxed = ConstraintsRelaxed(self)
@@ -207,7 +207,7 @@ def debug(self, solver=None, verbosity=1, **solveargs):
                               "                       to %s <= %.4g"
                               % (i, relax_percent, constraint.right,
                                  constraint.right, relaxval))
-                print "\n>> Success!"
+                print("\n>> Success!")
             except (ValueError, RuntimeWarning):
                 print(">> Failure")
         print
diff --git a/gpkit/small_classes.py b/gpkit/small_classes.py
index 94d0d085c..1b595060b 100644
--- a/gpkit/small_classes.py
+++ b/gpkit/small_classes.py
@@ -1,5 +1,4 @@
 """Miscellaneous small classes"""
-from collections import namedtuple
 from operator import xor
 import numpy as np
 from . import ureg
@@ -12,7 +11,6 @@
 
 Quantity = ureg.Quantity
 Numbers = (int, float, np.number, Quantity)
-CootMatrixTuple = namedtuple('CootMatrix', ['row', 'col', 'data'])
 
 
 class Count(object):
@@ -36,16 +34,17 @@ def to_(self):  # used in tocoo, tocsc, etc below
     return to_
 
 
-class CootMatrix(CootMatrixTuple):
+class CootMatrix(object):
     "A very simple sparse matrix representation."
-    def __init__(self, *args, **kwargs):
-        # pylint:disable=non-parent-init-called
-        # pylint:disable=super-init-not-called
-        # TODO these pylint disables go away with removal of namedtuple
-        CootMatrixTuple.__init__(self, *args, **kwargs)
+    def __init__(self, row, col, data):
+        self.row, self.col, self.data = row, col, data
         self.shape = [(max(self.row) + 1) if self.row else 0,
                       (max(self.col) + 1) if self.col else 0]
 
+    def __eq__(self, other):
+        return (self.row == other.row and self.col == other.col
+                and self.data == other.data and self.shape == other.shape)
+
     def append(self, row, col, data):
         "Appends entry to matrix."
         if row < 0 or col < 0:
@@ -207,7 +206,7 @@ def copy(self):
 
     def __hash__(self):
         "Allows HashVectors to be used as dictionary keys."
-         # pylint:disable=access-member-before-definition, attribute-defined-outside-init
+        # pylint:disable=access-member-before-definition, attribute-defined-outside-init
         if not hasattr(self, "_hashvalue") or self._hashvalue is None:
             self._hashvalue = reduce(xor, map(hash, self.items()), 0)
         return self._hashvalue
diff --git a/gpkit/solution_array.py b/gpkit/solution_array.py
index bb9e65622..507675768 100644
--- a/gpkit/solution_array.py
+++ b/gpkit/solution_array.py
@@ -197,7 +197,7 @@ def table(self, showvars=(),
     def plot(self, posys=None, axes=None):
         "Plots a sweep for each posy"
         if len(self["sweepvariables"]) != 1:
-            print "SolutionArray.plot only supports 1-dimensional sweeps"
+            print("SolutionArray.plot only supports 1-dimensional sweeps")
         if not hasattr(posys, "__len__"):
             posys = [posys]
         for i, posy in enumerate(posys):
diff --git a/gpkit/tools/autosweep.py b/gpkit/tools/autosweep.py
index 97e098d9b..55c2e96d6 100644
--- a/gpkit/tools/autosweep.py
+++ b/gpkit/tools/autosweep.py
@@ -233,8 +233,8 @@ def autosweep_1d(model, logtol, sweepvar, bounds, **solvekwargs):
     tol = recurse_splits(model, bst, sweepvar, logtol, solvekwargs, sols)
     bst.nsols = sols()  # pylint: disable=attribute-defined-outside-init
     if solvekwargs["verbosity"] > -1:
-        print "Solved after %2i passes, cost logtol +/-%.3g" % (bst.nsols, tol)
-        print "Autosweeping took %.3g seconds." % (time() - start_time)
+        print("Solved in %2i passes, cost logtol +/-%.3g" % (bst.nsols, tol))
+        print("Autosweeping took %.3g seconds." % (time() - start_time))
     if original_val:
         model.substitutions[sweepvar] = original_val
     else:
diff --git a/nomenclature.py b/nomenclature.py
deleted file mode 100644
index 7fe58f1c3..000000000
--- a/nomenclature.py
+++ /dev/null
@@ -1,35 +0,0 @@
-from gpkit import Model, parse_variables, Variable
-import numpy as np
-
-
-class Fuselage(Model):
-    """The thing that carries the fuel, engine, and payload
-
-    Variables
-    ---------
-    f                [-]             Fineness
-    g          9.81  [m/s^2]         Standard gravity
-    k                [-]             Form factor
-    l                [ft]            Length
-    mfac       2.0   [-]             Weight margin factor
-    R                [ft]            Radius
-    rhocfrp    1.6   [g/cm^3]        Density of CFRP
-    rhofuel    6.01  [lbf/gallon]    Density of 100LL fuel
-    S                [ft^2]          Wetted area
-    t          0.024 [in]            Minimum skin thickness
-    Vol              [ft^3]          Volume
-    W                [lbf]           Weight
-    """
-
-    def setup(self, Wfueltot):
-        exec parse_variables(self.__doc__)
-        return [
-            f == l/R/2,
-            k >= 1 + 60/f**3 + f/400,
-            3*(S/np.pi)**1.6075 >= 2*(l*R*2)**1.6075 + (2*R)**(2*1.6075),
-            Vol <= 4*np.pi/3*(l/2)*R**2,
-            Vol >= Wfueltot/rhofuel,
-            W/mfac >= S*rhocfrp*t*g,
-        ]
-
-print Fuselage(Variable("Wfueltot", 5, "lbf"))
diff --git a/setup.py b/setup.py
index 7376ec81e..3797858e8 100644
--- a/setup.py
+++ b/setup.py
@@ -53,7 +53,7 @@
     author_email="gpkit@mit.edu",
     url="https://www.github.com/convexengineering/gpkit",
     install_requires=["numpy >= 1.8.1", "pint", "scipy"],
-    version="0.5.3.0",
+    version="0.6.0.0",
     packages=["gpkit", "gpkit._mosek", "gpkit.tests", "gpkit.interactive",
               "gpkit.nomials", "gpkit.constraints", "gpkit.tools"],
     package_data={"gpkit": ["pint/*", "env/*"],