diff --git a/src/fibad/download.py b/src/fibad/download.py
index 11a3529..68338f1 100644
--- a/src/fibad/download.py
+++ b/src/fibad/download.py
@@ -71,9 +71,10 @@ def run(config):
             return
 
         # Create thread objects for each of our worker threads
-        num_threads = config.get("concurrent_connections", 2)
-        if num_threads > 5:
-            raise RuntimeError("This client only opens 5 connections or fewer.")
+        num_threads = config.get("concurrent_connections", 10)
+
+        if num_threads > 10:
+            RuntimeError("More than 10 concurrent connections to HSC is disallowed on a per-user basis")
 
         # If we are using more than one connection, cut the list of rectangles into
         # batches, one batch for each thread.
@@ -413,6 +414,9 @@ def rect_from_config(config: dict) -> dC.Rect:
             filter=config["filter"],
             rerun=config["rerun"],
             type=config["type"],
+            image=config.get("image"),
+            mask=config.get("mask"),
+            variance=config.get("variance"),
         )
 
     @staticmethod
@@ -461,7 +465,10 @@ def create_rects(
         for index, location in enumerate(locations):
             args = {field: location[field] for field in fields}
             args["lineno"] = index + offset
+
+            # tracts are ints in the fits files and dC.rect constructor wants them as str
             args["tract"] = str(args["tract"])
+
             # Sets the file name on the rect to be the object_id, also includes other rect fields
             # which are interpolated at save time, and are native fields of dc.Rect.
             args["name"] = str(
@@ -471,9 +478,9 @@ def create_rects(
             rects.append(rect)
 
         # We sort rects here so they end up tract,ra,dec ordered across all requests made in all threads
-        # Threads do their own sorting prior to each chunked request in downloadCutout.py; however
+        # Threads do their own sorting prior to all chunked request in downloadCutout.py; however
         # sorting at this stage will allow a greater number of rects that are co-located in the sky
-        # to end up in the same thread and same chunk.
+        # to end up in the same thread and therefore be sorted into the same request.
         rects.sort()
 
         return rects
diff --git a/src/fibad/downloadCutout/downloadCutout.py b/src/fibad/downloadCutout/downloadCutout.py
index a0c1706..6da1cfa 100644
--- a/src/fibad/downloadCutout/downloadCutout.py
+++ b/src/fibad/downloadCutout/downloadCutout.py
@@ -328,8 +328,8 @@ class Rect:
 
     rerun: str = default_rerun
     type: str = default_type
-    filter: Union[str, list[str]] = ALLFILTERS
     tract: int = ANYTRACT
+    filter: Union[str, list[str]] = ALLFILTERS
     ra: float = math.nan
     dec: float = math.nan
     sw: float = math.nan
@@ -344,8 +344,8 @@ class Rect:
     def create(
         rerun: Union[str, None] = None,
         type: Union[str, None] = None,
-        filter: Union[Union[str, list[str]], None] = None,
         tract: Union[str, int, None] = None,
+        filter: Union[Union[str, list[str]], None] = None,
         ra: Union[str, float, None] = None,
         dec: Union[str, float, None] = None,
         sw: Union[str, float, None] = None,
diff --git a/src/fibad/fibad_default_config.toml b/src/fibad/fibad_default_config.toml
index ec68156..eb202d1 100644
--- a/src/fibad/fibad_default_config.toml
+++ b/src/fibad/fibad_default_config.toml
@@ -35,7 +35,7 @@ retries = 3
 # `timepout` How long should we wait to get a full HTTP response from the server. Default 3600s (1hr)
 timeout = 3600
 # `chunksize` How many sky location rectangles should we request in a single request. Default is 990
-chunksize = 990
+chunk_size = 990
 
 [model]
 name = "ExampleAutoencoder"