My new home made center sliperential

Hey Serum, in another post, you speak about the motor snap and lengt of pinion..... Did you speak about the Tekno electri clutch?????
Because i'am to decide if i'll use it or a standard MOD1 pinion for my revo, and the lenght of the Tekno electri clutch is my only fear. On 4 or 5s li-po, i'am not sure if this thing will put to much stress on the motor shaft. I've a Neu 1515 and i don't want to snap a shaft on a $300 buck motor.