Guys, I just had the possibility to review the AT3 recently.

Most of the kit is very well made.
However I have noticed two things:

1) The main formers are made of cheap quality 3 ply plywood. The thickness is 5 mm which would have been fine if the wood was proper aero ply.



2) The wing front and rear spars and wing tube boxes are made of thin balsa with wrong grain once again. Given the weight of the plane and the fact that the main gear is in the wing, it might become a potential problem quite quickly.



Additionally the way the main gear plates have been set up is not optimal. They are just glued on the second and 3rd ribs with no real consideration for the torsion momentum induced in a hard landing.



Given the construction of the wing tube box, there is a risk that the torsion efforts crack the front spars after a while, especially if the plane is used on grass or has a hard landing on concrete.

The grain orientation will make the wing tube box develop horizontal cracks quite rapidly, I would say.