I had the first run of mine last night, indoors on a polished wooden floor. And after a couple of tweeks got a car I could really attack with.
I did notice the slipper adjustment nut was rubbing on the battery strap, and had actually worn a groove round it. On closer inspection I worked out that the peice of foam supplied to put between the Lipo's was pushing the packs too far apart. This was actually pushing the front retaining strap up, due to the chamfer where it meets the top of the pack.
The solution was to remove the foam and replace it with a smaller peice but between the front lipo and the front retaining strap. Essentially the lipos butt together and are pushed towards the back of the car. I was using the Demon 4200's.
I am also using 0.7mm shims on the rear suspension to provide free movement.
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