Yes, maybe u can try another set of servos on your e7. My old futabas (3 Years, over 1000 flights ) looks good without much play in the gears but anything didnt work so well 😂 . With my oldest gens ace lipo i have a still a little wobble at hard stops, but that problem is the accu. The rotor speed falls too much in stops and the fbl cant compensate this so fast...but with my other lipos its really cool 👍
