Alright... I figured it out. Even after reversing the gyro and confirming all settings and checks, it was still spinning like crazy. As it turns out, a little adhesive, a toothpick, and a stripped tail belt pulley made the difference. It seems that part was the cheapest, and I advise everyone having this spinning issue to glue or affix in some manner, the pulley attached to the belt, to the tail gear shaft. My tail rotor wasnt getting enough RPMs due to the slippage, but now it's ACE and no more spinning.