anon wrote:
You might not have found any "qualified" detractors, but a Google search
might yield some concerns. Why don't you look at something established
like the TEAM/Ison Himax/Minimax aircraft?

I also have not found any qualified detractors of this design(so far).

I did the obligatory google when I first found the design. The lack of
wide acceptance is of course a concern and part of the reason I'm
asking these questions.
The people who have actually built/flown the thing are very pleased
with it afaict. The minimax might be a future project for me as well,
but the entire affordaplane can be build for the cost of just the wings
of the minimax.
Also, I'm no engineer but the wing design of the Affordaplane appears
to be more stable than the minimax.