My son has been racing now for about a total of (6) days with his kit and has had great success. Although he's in novice he's taken TQ and 1st at both big races recently held here in UT. This past weekend I noticed (when he broke) that the rear toe/kick up block is awfully soft. I'm sure its a different plastic in comparison to the arms. Are the option alum. ones a must have? Do you guys buys the standard or LRC? He brock (2) of these this past weekend and I'm wondering what else may break.