i know why i couldent get it in.. accually the magnet on rotor had slided forward on the shaft so the shaft was hitting the rear cover.
from all my beating on it i alsmost made an hole in the cover
a new rotor and it slided right in there.

Days of struggle on this motor realy payd off, now if castle would answer my mail so i can ship in my maba xl and mamba monster i wil be happy.