Eventually made some progress today, spent lots of time doing other odd jobs this weekend. It's nice to get jobs done, especially when you have a list you can cross things off
Eventually got the rear end tacked into place; tooks lots of measuring, heaving, altering, shimming and more hands than I had available. got it done eventually though
Error = 1mm difference between diagonals thank you very much.
Also managed to get the SW's in place yesterday, meaning the bulk of the structure is nearly done. Yay!