I've installed this on my Reaction 44 jet as AMA requires brakes. Thought I'd share the idea....
I've got the nose wheel scrubber brake installed. Seems to work very well! I used a Hitec HS-81 (36oz) to activate it. I added a small extension spring to keep the servo from being stalled at full braking action. It is .032 diameter wire I wrapped around a 5/32" mandrel in my vise. I would highly recommend this spring to anyone using a similar setup. The aluminum "flapper" was fabricated from some 1/2" U channel I had. No friction material is used. The axle is 1/16 music wire. If she pulls left during braking, I'll just add some right steering mix.

Thats it for now....

Dave Rigotti