i have the new axe cpv3 i have big problems with the tail roter staying on the shaft.i ordered one new motor its was for a axe cp.he told me it would work on a axe cpv3 he just had to take the pinon gear off.i put the new tail motor on now the tail props keep coming off.this is starting to get exspensive.i took it to the hobby shop the guy put a drop of crazy glue on it and it keeps coming off.i think the cpv3 motor is not the same as the cpv motor.any help? advise would help,thankyou.