Yeah, I'll change the throat. I couldnt decide if I should have a round throat 20cm diameter (for 400cm^2 area) or if I should make it a sort of rectangular or oval shaped throat. Cuz both drivers need to share the throat, I was thinking that a round throat would be the least best of the three, and a rectangular or oval throat the best to get as much surface from both woofer cones as possible in the throat - what do you think? > I personally like equiangular and nearly equiangular folding.
I think its one of the most efficient/smallest/waste-free folding methods too, at least out of the various ones I've tried.