RE: 3.0m Comp ARF rudder counterbalance
The LE of the rudder, at the top, is for the most part open. However, I left the rear 1/4 inch and bent in so it followed the contour of the rest of the rudder LE (rounded at the back). It's not noticeable at all on the ground unless I'm in deflection, and gives it the clearance when it deflects. I think there was a picture on a websites associated with Andy Kane's JR Challenge from 2003, but I'm not sure if its there still. Its an easier mod to do than it initially seemed.