I have been racing now for a couple of weeks with my son, and I have noticed one thing that I would like to ask about.

The small plastic protection brackets that you put at the end of the shafts (#51536) don't last long. They break and fall off quite often.

I'm using the originals and these ones:

http://www.rcmart.com/spec-spr008ntm...h=595_744_1230

Are they just very short lived parts that you are required to replace often, or?