Hey Greenie check this stuff out.
http://www.boards.co.uk/articles/index.asp?article_type=25 It has stuff on mast track position, boom height and footstraps. Just follow the links i hope it helps, i thought it was an interesting read when i first saw it a few weeks ago.
Cheers Bertie

www.outdoorshots.com.au/view_sessionshot.php?eid=43&pg=6&sid=04p1313110
www.outdoorshots.com.au/view_sessionshot.php?eid=45&pg=1&sid=04p2043521