Used a measure of 1 and 1/4 inch between rudder and elevator at the closest point to approximate max rudder travel. Set the right rudder stop in place and drilled,,, screwed up ... for a change. Took the rudder stop off, and I've now got to refabricate a new stop, and fill the fuse skin holes with rivets. nothing structural, but it looks like hell... I'll install this at a later date,, I broke my stool. :( not a good day