I think I need new spur for my BL matrix, kinda awful sound with the metal pinion. The gap is ok but still the sound is horrible. I bought the buggy second hand and I think the middle diff is Hobao. What spurs would fit on it?
I have to say this new 70mm 2300kv Medusa is good with 4s. After 10min of driving on a track indoor today the motor was only 35C (95F)
Took a little video
http://www.youtube.com/watch?v=SkauGYdagKU