Finally got back to the trim tap for the elevator, solved the deflection issue perfectly, have now over 30deg +- deflection with a decent control horn.
Which required a new servo with bigger travel, simple ($145.-)? Also glued the push rod scube on.
Cutting the landing light cover was a bit tricky as they were just on the smaller side pre-cut! A bit bigger would be a nicer fit. Got also the bearings and the flaps installed and work on the leading edge of the flap needs some filling to make it round and straight.