I am stock at them moment -I went through one rear diff cup when the next one goes I'll swap to an aluminum one.
I have the linkage on a dead servo - so I can manually flip between two speeds - I put two steel idlers in. I run a robinson racing slipper with steel spur on 24/65.
Based on what I've seen now the 9XL will be plenty fast and a little cooler - I've just put 2 x 25mm fans on the motor too.
OK as i can read you have an e-maxx tranny???
I want to convert mine with the stock révo tranny, and think to keep the 2 speed intact with the wide ratio, an maybe put the new robinson racing hardened steel tranny gear set. Only downside of this steel gear set is not sure if i'll can make the jato pin mod in the tranny
And for your motor, you have the black or the purple one??