Bill, I agree with Ray Gardner regarding a rudder trim tab. IMHO, it isn't
needed. An Aileron tab, however, is useful - at least I've found it so
particularly when I go from flying solo to squeezing a 200lb passenger into
the right seat. The aircraft's response to that much change in lateral
loading makes a roll trim very nice to have.

Mine is a hinged aluminum strip about 1 inch x 6 inches on the inboard end
of the right aileron and it's effectiveness is way more than adequate -
Takes very little tab deflection to trim for straight and level with any of
the lateral unbalances I've ever flown with (admittedly, I haven't explored
the extremes but am satisfied with my trim power for conditions I consider
nominal - beyond which I wouldn't fly, anyway).

Dan Schaefer
Early LNC2