diff --git a/.changeset/silly-worms-hear.md b/.changeset/silly-worms-hear.md
new file mode 100644
index 0000000..a66aadf
--- /dev/null
+++ b/.changeset/silly-worms-hear.md
@@ -0,0 +1,7 @@
+---
+"@burnt-labs/abstraxion-core": minor
+"@burnt-labs/abstraxion": minor
+"demo-app": minor
+---
+
+simulation fix and granter override
diff --git a/apps/demo-app/src/app/layout.tsx b/apps/demo-app/src/app/layout.tsx
index d98c720..0f2ae0b 100644
--- a/apps/demo-app/src/app/layout.tsx
+++ b/apps/demo-app/src/app/layout.tsx
@@ -32,8 +32,8 @@ const legacyConfig = {
 };
 
 const treasuryConfig = {
-  treasury: "xion1h82c0efsxxq4pgua754u6xepfu6avglup20fl834gc2ah0ptgn5s2zffe9", // Example XION treasury contract with /cosmwasm.wasm.v1.MsgExecuteContract grant
-  // gasPrice: "0.001uxion", // If you feel the need to change the gasPrice when connecting to signer, set this value. Please stick to the string format seen in example
+  treasury: "xion1nn55ch09p4a4z30am967n5n8r75m2ag3s3sujutxfmchhsxqtg3qghdg7h", // Example XION treasury instance for executing seat contract
+  gasPrice: "0.001uxion", // If you feel the need to change the gasPrice when connecting to signer, set this value. Please stick to the string format seen in example
   // Optional params to activate mainnet config
   // rpcUrl: "https://rpc.xion-mainnet-1.burnt.com:443",
   // restUrl: "https://api.xion-mainnet-1.burnt.com:443",
diff --git a/packages/abstraxion-core/src/AbstraxionAuth.ts b/packages/abstraxion-core/src/AbstraxionAuth.ts
index c4c95b1..9eac87e 100644
--- a/packages/abstraxion-core/src/AbstraxionAuth.ts
+++ b/packages/abstraxion-core/src/AbstraxionAuth.ts
@@ -208,6 +208,7 @@ export class AbstraxionAuth {
           gasPrice: GasPrice.fromString("0uxion"),
           granterAddress,
           granteeAddress,
+          treasuryAddress: this.treasury,
         },
       );
 
diff --git a/packages/abstraxion-core/src/GranteeSignerClient.ts b/packages/abstraxion-core/src/GranteeSignerClient.ts
index ce726d2..dd3b209 100644
--- a/packages/abstraxion-core/src/GranteeSignerClient.ts
+++ b/packages/abstraxion-core/src/GranteeSignerClient.ts
@@ -8,8 +8,14 @@ import {
   EncodeObject,
   OfflineSigner,
 } from "@cosmjs/proto-signing";
-import type { Account, SignerData, StdFee } from "@cosmjs/stargate";
-import type { TxRaw } from "cosmjs-types/cosmos/tx/v1beta1/tx";
+import {
+  calculateFee,
+  GasPrice,
+  type Account,
+  type SignerData,
+  type StdFee,
+} from "@cosmjs/stargate";
+import { TxRaw } from "cosmjs-types/cosmos/tx/v1beta1/tx";
 import { MsgExec } from "cosmjs-types/cosmos/authz/v1beta1/tx";
 import {
   HttpEndpoint,
@@ -18,15 +24,19 @@ import {
 } from "@cosmjs/tendermint-rpc";
 import { customAccountFromAny } from "@burnt-labs/signers";
 
-interface GranteeSignerOptions {
+export interface GranteeSignerOptions {
   readonly granterAddress: string;
   readonly granteeAddress: string;
+  readonly treasuryAddress?: string;
 }
 
 export class GranteeSignerClient extends SigningCosmWasmClient {
   protected readonly granterAddress: string;
   private readonly _granteeAddress: string;
   private readonly _signer: OfflineSigner;
+  private readonly _gasPrice?: GasPrice;
+  private readonly _treasury?: string;
+  private readonly _defaultGasMultiplier = 1.4; // cosmjs 0.32.4 default
 
   public get granteeAddress(): string {
     return this._granteeAddress;
@@ -65,10 +75,12 @@ export class GranteeSignerClient extends SigningCosmWasmClient {
     {
       granterAddress,
       granteeAddress,
+      gasPrice,
+      treasuryAddress,
       ...options
     }: SigningCosmWasmClientOptions & GranteeSignerOptions,
   ) {
-    super(cometClient, signer, options);
+    super(cometClient, signer, { ...options, gasPrice });
     if (granterAddress === undefined) {
       throw new Error("granterAddress is required");
     }
@@ -78,6 +90,8 @@ export class GranteeSignerClient extends SigningCosmWasmClient {
       throw new Error("granteeAddress is required");
     }
     this._granteeAddress = granteeAddress;
+    this._gasPrice = gasPrice;
+    this._treasury = treasuryAddress;
     this._signer = signer;
   }
 
@@ -111,7 +125,45 @@ export class GranteeSignerClient extends SigningCosmWasmClient {
       ];
     }
 
-    return super.signAndBroadcast(signerAddress, messages, fee, memo);
+    let usedFee: StdFee;
+
+    const granter = this._treasury ? this._treasury : this.granterAddress;
+
+    if (fee == "auto" || typeof fee === "number") {
+      if (!this._gasPrice) {
+        throw new Error(
+          "Gas price must be set in the client options when auto gas is used",
+        );
+      }
+      const gasEstimation = await this.simulate(signerAddress, messages, memo);
+      const multiplier =
+        typeof fee == "number" ? fee : this._defaultGasMultiplier;
+      const calculatedFee = calculateFee(
+        Math.round(gasEstimation * multiplier),
+        this._gasPrice,
+      );
+
+      usedFee = {
+        ...calculatedFee,
+        granter,
+      };
+    } else {
+      usedFee = { ...fee, granter };
+    }
+
+    const txRaw = await this.sign(
+      signerAddress,
+      messages,
+      usedFee,
+      memo,
+      undefined,
+    );
+    const txBytes = TxRaw.encode(txRaw).finish();
+    return this.broadcastTx(
+      txBytes,
+      this.broadcastTimeoutMs,
+      this.broadcastPollIntervalMs,
+    );
   }
 
   public async sign(
diff --git a/packages/abstraxion/src/hooks/useAbstraxionSigningClient.ts b/packages/abstraxion/src/hooks/useAbstraxionSigningClient.ts
index acddd2f..c5408e4 100644
--- a/packages/abstraxion/src/hooks/useAbstraxionSigningClient.ts
+++ b/packages/abstraxion/src/hooks/useAbstraxionSigningClient.ts
@@ -1,6 +1,5 @@
 import { useContext, useEffect, useState } from "react";
-import { testnetChainInfo, xionGasValues } from "@burnt-labs/constants";
-import { GasPrice } from "@cosmjs/stargate";
+import { testnetChainInfo } from "@burnt-labs/constants";
 import {
   GranteeSignerClient,
   SignArbSecp256k1HdWallet,
@@ -22,6 +21,7 @@ export const useAbstraxionSigningClient = (): {
     rpcUrl,
     logout,
     gasPrice,
+    treasury,
   } = useContext(AbstraxionContext);
   const [signArbWallet, setSignArbWallet] = useState<
     SignArbSecp256k1HdWallet | undefined
@@ -59,6 +59,7 @@ export const useAbstraxionSigningClient = (): {
             gasPrice,
             granterAddress,
             granteeAddress,
+            treasuryAddress: treasury,
           },
         );