Thanks Crazy,
I picked up a Zippy 6S 5000mah 20C-30C pack to replace my 6S1P A123. I liked the A123 but wasn't a fan of the run time, especially for racing.
First initial test run was good. Motor warmed up but nothing bad. Second run didn't go so well. Had a light dusting of snow so after about 8-9 minutes of wheel spin and drifting I got a lot of glitching and no go. Tore the motor down to find this.
Looks like the magnet let loose and was flopping around in inside
I think I'm going to give one of those 70mm or 80mm medusas a try and definitely gear down a bit. It was EXTREMELY fast geared 22/66 and obviously over worked the motor