We have been building a new U4 specific track here in town, and it will take some doing to build the group to drive. There are only a handful of platforms which will do reasonably well for U4, but I think newer drivers will be shocked as to the maintenance and parts replacement needed to keep them up and running. I run a Lasernut and I feel it's a very good platform. I believe larger clubs in Cali and in Washington State have classes which helps level the playing field.
Losi Lasernut