The nimh batteries I was going to use slipped in through the roll bar and one end rested on the front bulkhead. The lipo is a little bigger so I may try to clearence the roll bar and fit the battery there strapped in securely of course. If that doesnt work out I will lose the roll bar and build a tray from aluminium that will sit just above the spur gear. The goal is to keep the battery weight in the center and as low as possible.

I did another test run last night. This thing is a lot faster than the G3.0 nitro engine. Motor temps were a little over 170° after only three high speed runs with the 18 tooth pinion so im going to try the 19 tooth pinion tonight. Also have to check my battery as after the three runs power dropped quite a bit. I dont think the esc folded the power back due to temp as it was just under 100°. I would like to see motor temps at or under 160° or so.