diff --git a/ts/client/src/accounts/healthCache.ts b/ts/client/src/accounts/healthCache.ts
index 87be5c719..6efbe6fbd 100644
--- a/ts/client/src/accounts/healthCache.ts
+++ b/ts/client/src/accounts/healthCache.ts
@@ -200,6 +200,23 @@ export class HealthCache {
     const sourceBank: Bank = group.getFirstBankByMint(sourceMintPk);
     const targetBank: Bank = group.getFirstBankByMint(targetMintPk);
 
+    if (sourceMintPk.equals(targetMintPk)) {
+      return ZERO_I80F48;
+    }
+
+    if (!sourceBank.price || sourceBank.price.lte(ZERO_I80F48)) {
+      return ZERO_I80F48;
+    }
+
+    if (
+      sourceBank.initLiabWeight
+        .sub(targetBank.initAssetWeight)
+        .abs()
+        .lte(ZERO_I80F48)
+    ) {
+      return ZERO_I80F48;
+    }
+
     // The health_ratio is a nonlinear based on swap amount.
     // For large swap amounts the slope is guaranteed to be negative, but small amounts
     // can have positive slope (e.g. using source deposits to pay back target borrows).
diff --git a/ts/client/src/client.ts b/ts/client/src/client.ts
index 87d6174b5..cdb26b868 100644
--- a/ts/client/src/client.ts
+++ b/ts/client/src/client.ts
@@ -541,14 +541,22 @@ export class MangoClient {
     accountNumber?: number,
     name?: string,
   ): Promise<TransactionSignature> {
-    return await this.program.methods
+    const transaction = await this.program.methods
       .accountCreate(accountNumber ?? 0, 8, 0, 0, 0, name ?? '')
       .accounts({
         group: group.publicKey,
         owner: (this.program.provider as AnchorProvider).wallet.publicKey,
         payer: (this.program.provider as AnchorProvider).wallet.publicKey,
       })
-      .rpc({ skipPreflight: true });
+      .transaction();
+
+    return await sendTransaction(
+      this.program.provider as AnchorProvider,
+      transaction,
+      {
+        postSendTxCallback: this.postSendTxCallback,
+      },
+    );
   }
 
   public async expandMangoAccount(
@@ -576,14 +584,22 @@ export class MangoClient {
     name?: string,
     delegate?: PublicKey,
   ): Promise<TransactionSignature> {
-    return await this.program.methods
+    const transaction = await this.program.methods
       .accountEdit(name ?? null, delegate ?? null)
       .accounts({
         group: group.publicKey,
         account: mangoAccount.publicKey,
         owner: (this.program.provider as AnchorProvider).wallet.publicKey,
       })
-      .rpc({ skipPreflight: true });
+      .transaction();
+
+    return await sendTransaction(
+      this.program.provider as AnchorProvider,
+      transaction,
+      {
+        postSendTxCallback: this.postSendTxCallback,
+      },
+    );
   }
 
   public async getMangoAccount(mangoAccount: MangoAccount) {
@@ -768,7 +784,7 @@ export class MangoClient {
         [bank],
       );
 
-    return await this.program.methods
+    const transaction = await this.program.methods
       .tokenDeposit(new BN(nativeAmount))
       .accounts({
         group: group.publicKey,
@@ -787,7 +803,16 @@ export class MangoClient {
       .preInstructions(preInstructions)
       .postInstructions(postInstructions)
       .signers(additionalSigners)
-      .rpc({ skipPreflight: true });
+      .transaction();
+
+    return await sendTransaction(
+      this.program.provider as AnchorProvider,
+      transaction,
+      {
+        additionalSigners,
+        postSendTxCallback: this.postSendTxCallback,
+      },
+    );
   }
 
   public async tokenWithdraw(
diff --git a/ts/client/src/debug-scripts/mb-debug-banks.ts b/ts/client/src/debug-scripts/mb-debug-banks.ts
index 3a8d8f7f7..9e7bed3d4 100644
--- a/ts/client/src/debug-scripts/mb-debug-banks.ts
+++ b/ts/client/src/debug-scripts/mb-debug-banks.ts
@@ -2,7 +2,7 @@ import { AnchorProvider, Wallet } from '@project-serum/anchor';
 import { coder } from '@project-serum/anchor/dist/cjs/spl/token';
 import { Connection, Keypair } from '@solana/web3.js';
 import fs from 'fs';
-import { ZERO_I80F48 } from '../accounts/I80F48';
+import { I80F48, ZERO_I80F48 } from '../accounts/I80F48';
 import { MangoClient } from '../client';
 import { MANGO_V4_ID } from '../constants';
 
@@ -69,6 +69,24 @@ async function main() {
   for (const bank of await Array.from(banksMapUsingTokenIndex.values()).sort(
     (a, b) => a.tokenIndex - b.tokenIndex,
   )) {
+    const vault = I80F48.fromNumber(
+      coder()
+        .accounts.decode(
+          'token',
+          await (
+            await client.program.provider.connection.getAccountInfo(bank.vault)
+          ).data,
+        )
+        .amount.toNumber(),
+    );
+
+    const error = vault.sub(
+      (bank as any).indexedDepositsByMangoAccounts
+        .sub((bank as any).indexedBorrowsByMangoAccounts)
+        .add(bank.collectedFeesNative)
+        .add(bank.dust),
+    );
+
     let res = `${bank.name}`;
     res =
       res +
@@ -76,6 +94,7 @@ async function main() {
       `\n ${'bank'.padEnd(40)} ${bank.publicKey}` +
       `\n ${'vault'.padEnd(40)} ${bank.vault}` +
       `\n ${'mint'.padEnd(40)} ${bank.mint}` +
+      `\n ${'error'.padEnd(40)} ${error}` +
       `\n ${'collectedFeesNative'.padEnd(40)} ${bank.collectedFeesNative}` +
       `\n ${'dust'.padEnd(40)} ${bank.dust}` +
       `\n ${'deposits'.padEnd(40)} ${bank.indexedDeposits.mul(
diff --git a/ts/client/src/debug-scripts/mb-debug-user.ts b/ts/client/src/debug-scripts/mb-debug-user.ts
index 66172eb81..0c9044512 100644
--- a/ts/client/src/debug-scripts/mb-debug-user.ts
+++ b/ts/client/src/debug-scripts/mb-debug-user.ts
@@ -91,6 +91,7 @@ async function debugUser(client, group, mangoAccount) {
     );
   }
   getMaxSourceForTokenSwapWrapper('SOL', 'BTC');
+  getMaxSourceForTokenSwapWrapper('USDC', 'USDC');
 }
 
 async function main() {
diff --git a/ts/client/src/utils/rpc.ts b/ts/client/src/utils/rpc.ts
index 82f2c8c67..fa4b47a72 100644
--- a/ts/client/src/utils/rpc.ts
+++ b/ts/client/src/utils/rpc.ts
@@ -12,6 +12,9 @@ export async function sendTransaction(
     await connection.getLatestBlockhash(opts.preflightCommitment)
   ).blockhash;
   transaction.feePayer = payer.publicKey;
+  if (opts.additionalSigners?.length > 0) {
+    transaction.partialSign(...opts.additionalSigners);
+  }
 
   await payer.signTransaction(transaction);
   const rawTransaction = transaction.serialize();