This was very helpful advice! I used the shaft of the old rotor to guide the new one in through the front bearing and it worked great. After complaining about the clumsily cut shaft of the last rotor, the new rotor they sent me is completely uncut and has spare room for a pinion in the back too.

Added some locknuts to the Basher Rally gear and using a Revo spur adapter for pinion. Geared down to 36/42 as I'm not happy with the >3V ripple I saw on the XL2 and, realistically, I need to find a better place to drive fast anyway, as the slightly curved forest road I have been using, has disaster written all over it... Nice thing is that on 7S, 36/42 gearing yields 184 kmh again, same as previous gearing on 6S, so will be a very nice comparison:

http://www.rctech.net/forum/members/...t2-gearing.jpg

http://www.rctech.net/forum/members/...photo-4-12.jpg

http://www.rctech.net/forum/members/...-photo-5-5.jpg

Hey Dr.T, just a crazy idea (since I bought some titanium rods lately): Get some 8mm grade 5 titanium rod and replace the shaft with that for less rotating mass.