Amerisync, Quickbooks, and Partial Refunds

Customer returned item that was ordered and paid through the shopping cart.

Sales receipt was long ago synced to QB using Amerisync.

Now I'm trying to figure out the best way to do a partial refund against a SALES ORDER without messing things up in QB.

Has anyone else slayed this beast?

A refund processed through the cart won't import.

QB won't let you issue a credit memo against a sales receipt.

I'm about to try this but was hoping someone had solid info to offer:

Void or delete Sales Order in QB

Create Invoice in QB to match deleted Sales Order

Create Credit Memo in QB and apply to Invoice

The only part that concerns me - and I guess I'll find out when I try - is how this will affect my bank deposits - will they still balance?