Any advice on good quality, cheap follow focus gears for micro 4/3 lenses? I need them for the Oly 17mm f1.8, as well as the Oly 12-40 f2.8. My follow focus is the RT motion wireless system. (It's for our Epic rig, but I want to use a modified version of it with a GX7 we have acquired.) I realize the auto focus is very good, but we are shooting a 70's-set 16mm-look, and I don't want to see any electronic-looking autofocus. Since we have the wireless, I figure, why not use it?