"The CG of any aircraft should be at 1/4 or 1/3 of the chord. Always. Great planes, by the way..."

"1st- Yes. Be at the same scale isn't everything.
2nd- No. The chord is to big for that separation. The best solution is to put the second wing at a upper level. (The turbulence usually goes down.) Like quickie.

Another thing: some times, at some…"

"Quickie should have a great performance... the wings are in very different planes. And at a vertical safe distance."

"Proteus is a very different design... Just compare the distance between the two wings and the chords... The turbolence from the first wing is not so big( because of the aspect ratio), and it's almost gone when the air reaches the second wing.
And by…"

"The second wing gets the turbolence from the first one. That's why you can't put the second one at the same level. That's why is not a known design..."