That's great, that it worked so well. I know I need to put a beefier relay in to switch the amp to TX. I know I need to put a diode across the relay coil to protect the uBITx I'm looking fir advice / schematic on wiring the relay and where to connect to the uBITx to pick up PTT to switch on the relay.
The external commercial relay I have on the Kenwood by radiodan will work if I replace the kenwood cable, but I'd prefer to build it in to the case.
The PTT picture you sent was just a thumbnail and I couldn't make out any details.