but have you ever experinced a 2.5 probebly not, so shut up, doesnt matter how much you`ve been in this hobby, you nevr had a traxxas, plus traxxas makes hard to tune engines, if you cant get it to work you dunt need to change it or buy a enw engine, its all in tuning, my pro.15 is as much pain in the ***** to tune as the 2.5 , beleive me, i tuned mine and mine freinds rusty, so i would keep my mouth shut if i never had experience