wow Don, I was about to reply to your comments about burnishing when I began going through your threads and ran across a thread on ackerman. I have had problem with my elevator all season and finally I think I have solved it. I chose to do a full flying elevator on my SR E111. I took the carbon fiber leading edge and made it the pivot point on my structure. I used a dowel for the LE and used SR's controll horns, which are 1 piece and wrap around the carbon fiber spar which is the hinge point for the entire structure. Every once in a while the E111 would start" porpoising",and I recognized that it had something to do with the fact that the elevator was "loose". No matter how much I tightened up the pull-pull lines I still had the problem and in fact, since I had a single spar for a pivot point it would begin to bind. The ackerman article just prompted me to measure my control horn and I found that the connection point for my horns are 5/32' in front of the forward edge of the spar and 11/32" in front of the center line.The last 2 paragraphs of the ackerman article make since until you consider that the E111 full flying elevator is 3 1/4" in front of the hinge line and 6 1/2" behind it!
I will be grounding my E111 until I redo the elevator. But I can't wait till I get to the field with it and show everyone how "smart" I have become!
BTW I love the" Flying" pic of yor E111. You should make it your signature instaed of the BE2.