From Simon:
The board is called Obomodulan and is produced in many different densities. They have a very useful set of samples in a wee box – you should get one.
We have used 210 very light foam through 302 (use a lot of it) 500, and 600 which is as dense as we would want to go.
The company is called McCausey Lumber Co. in Michigan.
Tel: 1 800 365 9663 or 586 294 9663
Name Blair Wollenzin