if your chewing your slipper you need to loosen it a bit we had the same problem with chassis flex and the spur gear mashing the cb. We have found a looser sliper fixes that problem. Currently the jato has an OS .18 TZ EB Modded in it and the chassis has crazy flex. Stock chassis though so we were thinking the new era one would be good. And the tz engine screams like a raped ape so its not a tuning issue it the fact the jato weights 20% more than my rc10gt so it needs a bigger motor. Engine for engine car for car it wouldnt be a race if i had the same engine on my rc10gt. It would kill the jato all day at everything if my rc10gt had the tz eb modded. And anyone who says its a tuning issue feel free to look at my video on youtube look for jato flips and thats the jato im talking about. No tuning issues what so ever the engine holds a tune perfect. Minor ajustments but not like the 3.3 or the cv-r this engine holds a tuning way better. My car has no lack of power concidering it can wheelie at half speed with a single speed tranny until i loosened the slipper b/c we chewed up spur gears mashing with the cb when we hit bumps at high speed.