Re: F1 and customs
"Your probable employer was sponsored by TAG and because of that was the only team I didn't supply."
Indeed it was for the team whose boss was famous for not putting a wheel back properly on Jack Brabham's car, causing some harsh words to be said. He seemed to learn from it since he became fanatic for good pit lane procedures.
The actual application we were looking at was re-using some military stuff to squawk compressed data streams back as the cars passed the pit lane. Superseded these days by work I suspect you did to get continuous coverage around the circuit.