Good section of another thread here

Read from this point
http://www.woodworkforums.ubeaut.com...056#post723056

One person had problems with their ply being not quite long enough (it does need to be a nominal 8ft x 4ft (2440 x 1220) and not the metric size sheet (2400 x 1200) - but small differences are no problem.

Also Mike (a great bloke) found his bottom a bit short - but following the plans would have prevented a small error.

Best wishes
Michael