I am also very interested in the gate shifter. I just ordered my Kartboy shortshifter today so yes I would have to agree with the above posts to design it for the KB shifter.
How much would it cost and how close are you to getting it to work. Do you need to get reimbused for the funds for the raw material. I was running the gate shifter idea a few days back and it seems people are already ahead of me ... cool. Do you have a number which I can call to discuss the status further? Thanks.