If you're trying to do a small drum machine build here...DON'T. You're far better off with a dedicated drum machine that does more (because it's designed for this purpose) and costs LESS than your efforts here. But to be frank, I don't see what you're aiming for here.

IMHO, having to wrassle with two Disting EXs will be a real chore unless you're all about menu-diving. And a lot of the rest doesn't make sense without context, I would presume.