personally. i think there should be a stock twin class. and i agree. a BP is way to fast for the ride hegith, if you stick that money into a BP, your better off building a fxt. Id be happy to see a GP-T class
why do you think BPs are too fast for their chassis? If you don't want to go that fast, don't build one to run fast. Put your stock twin on & ride in the back. why cut out a class so you can build something that you don't have a class for?