concerning this 'Are you planning to use their odd foot decompression actuator?': I was a bit surprised as I first saw it on the cafe racer. But it should be easy to replace it by a handle-bar-lever and a bowden-cable, isn't it?
Btw, the bike looks really nice compared to all those modern plastic covered stream-liners ... have fun with your build and keep us informed!
Kind regards, Bambi ... one from the past ...
'Find me kindness, find me beauty, find me truth ...'
(Dreamtheater, Learning to live)