new 2 stage hipshot extenders
 

I saw that you can get a new lever for existing d tuners that will allow you to set to D and C in two stages.
Sounds interesting.
Does anybody here have a a setup like that? Does it work well?
I've been using the regular D tuner and the fingering is OK but going to C on the E string would make it much harder to wrap your brain around the new fingerings.
Is it in any way practical at all to drop the E down to C with that kind of a shift?

Yes you get a fat C with a flip (or two) of a lever.