i run 12/46t (plastic) and no issues, however i dont have the new chassis yet, but in the pics the brace is on the other side so gearing should be open to just about every possibility
and the chassis i am planning on it , a 1500kv 1512 3.5d set-up and 6s , just have to wait for my tax return, i have noticed that most 6s batterys are like 400 grams or less , so it will be much more balanced then the 4s set-ups when comparing motor to battery weight, and the batterys are better priced as well , Mikes new 2500 mah 6s batterys and conv. are on my list , and a motor as well
i think that all of RCM mounts will go down to a 12t pinion with a finned can motor
from what i have heard Mike races an rc8 now , so i am sure the chassis will be the BOMB