Thanks fellows for the information and advice!IN the end here I called SIG they were super helpful,we spent lot of time with there books there trying to figure what needed many parts on on same sheet ply etc so hard to tell.We did find couple cabane Alum.parts for couple dollars so ordered them and the plans as most of system seems to be wood so with the plans can make the wood parts up.Should work out OK.Again THanks for the responses.Bob Moodie