Hi Dave, I haven't tried this type of board but it seem cool.
http://www.hearlihy.com/store/detail.aspx?ID=2354&bhcp=1

I talked to J Sobon at the Geo workshop and he said he was using some type of lined paper. The angles were already to go, just plug lengths, size and such into it.

Maybe something like this....
http://www.hearlihy.com/store/default.aspx?CategoryID=89&by=9&c=1

I hope you share your results.