BTW, the strong pitch on takeoff after the wing was screwed down more is not a surprise. Trim for level flight with extra wing incidence, then reduce the incidence and what happens? Next flight, after the incidence change, the wing is going to go to about the same AOA as before, and that''''s going to change the tails AOA. It''s going to try to correct the pitch that doesn''t need correction and it''ll do it wrong until the trim is changed.

It''''d be surprising if you didn''''t need a fair amount of elevator trim to fly level after tightening the wing on tighter.