You shouldn't have any problems with the length of the motor output shaft as I think they are all standard, but the pinion for the Blade may not be the same tooth pitch as the EXI main gear. I think the EXI will probably have the same pitch as the Align T-Rex which is module .5. The Blade may or may not have the same pitch. Pinion length should be standard as well but I don't know what the shaft diameter is on the Blade motor, but it's probably 3.17mm. Just make sure if you need a different pinion it fits the motor shaft and has the proper pitch. Tooth count on the pinion should be 11 to 13 tooth. Alan