I can't wait to see yours. I'm still working on mine. Finaly won a klaxon off e-bay last month !
Sorry for huge pic.
I made my own custom lock cable, leather wraped, to keep the "Look". I think it turned out nice for as simple it was to do. (It's the coil under the seat, in pic below)
Looking forward to watching how you do things. I may hold off to see a pro do it first. With the problems I've had...it won't hurt.