Getting that derailleur perfect is quite a task. Be very gentle shifting, do like 5% throttle to shift, don't go WOT till after its fully engaged with the next gear. I've been enjoying my 7 speed with a shift kit, but that derailleur is a headache. Finally got my new derailleur shifting right, new 8 speed chain and new freewheel cluster on since chewing out my last few gears and beat the crap out of my derailleur and chain in the oct 27 socal race. You are gonna love gears.