I do realise some question quality control,,and sometimes i can see why........... but the site i dropped into this forum,, every motor is benchrun,,at www.wolfmodels.net , to assure it meets a quality control standard,, he knows all about warrenty claims,,and how modelers feel,, when things dont go right,, thats why,, wolfmodels have there own internal testing and they fly what they sell, that i guareantee,, I fly with them,, and fly models,, from them,, all the time..i would recomend you check out,, this before u form an opinion