Posted for "Gary Fitzgerald" <gbfitz@swbell.net>:

Kevin,

I just went through this with my Mk II tail for my LNC2 a few months ago.
Your problem is either with your trim tab arm location or your clevises. It
looks like you have the TT-02 trim tab arm, which seems to work better than
the TT-01 arm.
Take off the clevises and position the elevator and trim tab in a neutral
position (like in level flight with no elevator deflaection), and make sure
the hole in the trim tab arm is directly above the hinge pin on the trim tab
hinge (if I remember correctly the arm sticks above the trim tab on thr
Legacy, as opposed to below the trim tab on the LNC2). If it is too far
forward or aft it can affect your travel symmetry. Now position your servo at
the center of its travel, and measure the distance between the hole in the
servo arm and the hole in the trim tab arm. If this distance is less than the
distance between the pins on your clevises, you're going to have to get
creative. Mine was all of 1 inch. Maybe I can use my clevises someplace
else, but not on the elevator trim tab. I'm making a custom attachment.

Thanks to Pete Barber, Bob Patusek, and Tim Jørgensen who helped me solve my
elevator and trim tab problems.

Gary Fitzgerald
LNC2 standard build ~67%
Engine: TBD
St. Charles, MO

 [We had a similar problem with Ted Noel's IVP... once the proper distance between the servo arm hole and the trim tab arm hole was determined I machined a small pushrod from aluminum rod that locked in that distance and allowed for symmetrical travel of the trim tab.  Worked out very well.  Photos attached.   <Marv>   ]