I built one a few weeks ago and junk the spur and slipper pads, it overheated and the slipper nut backed off and started melting the plastics around it , first three heats after 6-7 laps the slipper had backed off ???
I fitted a durango 85 t spur and ae hd pads and perfect and 6-7 10ths a lap quicker than my 210, this is on indoor astro. Apart from this kit build.
Will have my 2nd race this weekend so will know more after this.

