Has anyone had experience with the APT smartcarb? It's supposed to be altitude compensating, and also able to change mixture setup without taking it apart.
http://www.powerapt.com/Features.php

A bunch of people have them on dirt bikes and have been getting great results with it. I was wondering how difficult it would be to get this working on our Honda machines? They've run vehicles up Pike's Peak in Colorado with it, and it seems to work ridiculously well. They are not very easy to get however, as APT's production time has been a big hangup for a lot of people.

Mike