Not really all that amazing Swager the pyramids in Egypt are amazing enlarging RC airplane plans is very simple and easy to do. Any basic cad drawing software will work. I simply scan all my parts on my scanner those that are to big to fit the scanner like fuse sides I just scan it in two or three sections. Once you have everything scanned into your Cad program you can bring your fuse sections together take a few measurements and make sue it all looks proper. Then you simply resize the parts all at once in the software then print the parts out and transfer the drawings onto some wood balsa light ply whichever and cut them out easy (I spray glue the paper pattern to the wood it removes easily with a heat gun). Remember when cutting parts may just as well stack four or more sections of wood together with a light dusting of spray glue, works for all those ribs too. This gives you parts for two or more planes with the same amount of effort as cutting parts for just one.