Yep, your right Steveyb
Our current worry is that a lot of Streetstock riders will say "stuff these new rules" and just ride their 150's in F3, where they're perfectly eligible. Naturally this is a shame for Streetstock, and a disaster for F3, already with full grids at most club meetings. Having an extra 20 ex Streetstock bikes in there would not be good.
And the rules we submitted last year, were actually TIGHTER than the existing MNZ rules. Sounds odd, but if you "read up" it's true.