Hi Keith - I have tried a slotted horn and that is OK for changing ratio
of elevator to flap movement. It doesn't help when you need to adjust
a change in the neutral position. For example, add a little down elevator
to eliminate inverted flight waviness. It may also be required when the moisture
level changes the fuselage length. The change in length of the pushrod is
what I want to do in an easy manner that is safe for the life of the ship.
Sincerely, Walt