Electric power can stand to use a little more flywheel.

Shimming a new diff wrong can ruin it in one minuet of run time. On some rc’s Proper shimming keeps the sides from too much pre load pushing the outdrive into the case, to much shimming is just as bad as not enough.

Glass filled nylon66 can continuously operate at 180 degrees F and silicone oil has remarkable stability upto 250degree C or 480F.