I do not think that separating the superstreet class is a good idea.
If the rider is advanced he/she should move to Novice class with the club.
That is the next level.
After all the superstreet is introduction class to the racing.
I think the class should be limited to 2 superstreet runs per rider in 1 season. Then make your choice. Move up to the club or stay trackday rider, but no more Superstreet for you till next year.

With the advanced rider moving up to Nov, he will get also more riding/practice for the money.
As the Superstreet is only $100, maybe when the rider decides to mov up to Nov it might be too expensive for him at that point, so he can get a break on the licence fee or something, to make it more easy financialy to move up.
My point is that we are trying to draft them into the club, not loose them so they should move up ASAP

Just thinking