Harter's Royal Rodent was designed for a Dooling 29. Those kits come up on ebay every once in a while. Rat Race as we knew it is no longer around. I think they are flying 15-size rat now. Check the new AMA rule book when it comes out or go to the NCLRA website. There is an event called Quickie Rat with profiles flown mostly with K&B baffle piston 40's that is becoming popular. Rules are on the NCLRA website.

Jim