I swapped out the SRAM PG-1230 Eagle (11-50, 12 speed) that came with my Powerfly 9.7 with an Eagle GX (10-50, 12 speed) and I notice some weird inconsistency with the motor, the top 5 gears of the GX are the same as the PG, -1 tooth per cog. However, it feels as if the motor doesn't quite know...