Thanks for the input guys, I'm still tinkering with everything. I tried to make hold breathe ctrl+rightclick but it turned red and showed CTRL so I'm not sure how to do it either.
I agree deadzone is important I've tried it maxed, 0'd out, now I play at about half. I think you're right that we've been conditioned to be turned off by a deadzone because of all the other games we play so I may turn it all the way down and see how I like it.
I'm curious as to why you would have different sensitivities for each axis, I know the default has Y higher, I just can't figure out why.