There has been plenty written herein about the Affordaplane and the engineering of the design. I am currently sourcing some engineering texts related to aeronautics, but perhaps someone here can offer a quick, yet academic answer. I want to make whatever changes are required to increase the gross for this design. This could mean any number of changes. I anticipate more wing area, perhaps stronger or more numerous fasteners at the wing roots, larger gussets, beefier landing gear, stronger struts, more thrust, etc. I'm trying to nail down the formula that rests at the heart of this 540 number. When I find it, I will then know how to manipulate it. Obviously, I won't be going the part 103 route. Any useful tips? Thanks in advance.