Brakes
Try Don's Hobbies ( (785) 827-3222) in Kansas. He sells a brake that I think is called the Uni-brake. It can be use with Robart wheels. I have a set on my Byron F16 and so far they have worked great........and they are about $60.
He also has great prices on JR radio stuff.
Also Philip Avonds used to sell a brake that worked with Robart wheels