Someone posted that the M06 suspension shaft with the ball end was not legal to use on the m05. Not a big deal, but there are exceptions to the rule of not switching parts from one model to the other in TCS racing. Examples of these are TC shocks, TC springs, and TA03 ball diffs. There are others, but it's past my bed time and can't think of them right now. My guess is that this mod will go sliding past in tech.
No one in his right mind will purchase an entire kit to obtain a set of these arms. The guy writing the rules in the USA is reasonable and probably will pass on this.
My comments are for the USA only and may not be applicable elsewhere