Hi Andrew I converted 10 inch F7.3 into a truss here are a few pictures
http://www.iceinspace.com.au/forum/s...ead.php?t=9779 . For me collimating every time I set up is the only down side, but you become so used to it that it only takes a couple of minutes. I use a shroud only when I view from home. The Dobsonian Telescope by David Kriege and Richard Berry is an excellent guide for building a truss telescope.
Regards Cristian