This was extremely timely, as I had just started looking for a TCU for the GF's July 04 build date, due to the consensus being that a TCU SWAP was the only way to get it to work. If however we can merely invest the same $300 into an older laptop and NCS expert, I'd much rather go that way!

Could you clarify what you mean by it "reverts to speaker"? Does the call drop back to handset when the other person answers?