Hi,
No, you can't use a ZZ controller, as Epoch's are proportional, an xmod controller won't work either.. but you could pick up a cheap mini-z controller or other on e-bay....
I'll snap some pics of the epoch now, I'd rather not take it out the box again though to be honest. if you want then I will do once we sort out a trade.
you can use xmod crystals,though