Any math-heads used a real manoeuvring board to plot solutions?

[Pisces]

I think there is a scan of a maneuvering board sheet somewhere in the downloads section.

Nope, it's a (formerly known as Google) Sketchup template:

http://www.subsim.com/radioroom/down...o=file&id=3708

I do have a scan of a maneuvering board sheet (US Defence Mapping Agency) in my private collection (no doubt picked up somewhere in subsim forums) as .png file, 1939x 2003 pixels. But you'll have to fiddle with scale to get it right on paper.