When all the original A500s are gone, it'll be good to have an open source method of making more.
Baby steps. You need to develop a clone A500 as a test-bed before you can develop a clone A1200, then a clone A4000 then a new MiniMig 060/PPC with PCI slots, USB, etc. etc. etc.
Did you learn to crawl before you could walk, and walk before you could run? Or did you start off as an olympic sprinter from day one?