I'm sure some of the guys from Ottawa have posted here before but I'll post anyway. Our beginner class is 4 cell stock on rubber or foam with a minimum weight of 3lbs. At the last race we had 10 entries which actually made it the largest class on the day. The fastest guys were running 25 laps which was only a couple of laps off the top 6 cell rubber guys and ahead of most of the 6 cell rubber guys.
The class is fun and while we still break, we break a lot less than the 6 cell guys. I'd highly recommend it as a starter class.