He has had this LT ARF for less than a year and had the LHS order it from Sig so it should be from the latest batch. My father doesnt do kits even tho I keep suggesting he do so now that he is retired. He had to replace the wing due to a chance meeting with a tree but the climbing thing was happening before the wing replacement and continued after.
It flies very slow and sedately but whether facing into the wind or flying downwind, you still need to force it down to land even at idle.
Anyway, I will have him re-check the CG first. If that is correct or correcting it doesnt solve the problem I think we will try the popsicle stick shims at the trailing edge.