If TAG USA changes its rules regarding the rotax and being able to change to a K22 needle and a CIK airbox I would hope that the CSC would look at adopting those changes. As TAG USA test have shown these modifications on the rotax do not affect the peak HP numbers they will help it out in other areas of the powerband (low-mind range) As people have mentioned the incovenience of having to change parts these are really very minimal. It takes me much longer to bolt on the extra weight to run CSC events than it would to change an airbox and needle so that really seems like a non-issue to me. If these changes are available I really hope that CSC allows us (rotax guys) to make them. I think it help keep the rotax competitive on the tight tracks. Just my $.02