First time buggy conversion - need some input

[m_podt]

I'm new to this forum and new to the world of brushless. I plan to convert a Mugen MBX5 so I could use some input from you guys. I already got a lot of great tips from Serum, but you like to have some more input from more than 'just' one person. ;)

Motor and ESC: I don't want to spend too much money, so my idea is to use a Feigao motor and the Warrior 9920. The idea is to start with 12 (or 14) NiMH cells. Now I cannot decide between the 8XL and the 7XL. It seems that the 7XL is on the edge for the 9920?

Gears: as far as I know, the nylon Kyosho spurs won't fit the Mugen diff. So I want to fit a Kyosho diff in the Mugen. Gears I want to use: 46 tooth spur and a 14 pinion.

Engine mount: it seems that a modified E-Maxx engine mount is the easiest way to mount the motor. I have seen some very nice engine mounts on this forum, but will the E-Maxx mount suffice?