How fine is the texture - are the bumps higher than, say, 1mm; are they smooth and big or sharp and small, how far are they apart...? Or is it just a sort of texture that is roughish to the touch?
How thick is the board, 3/4" or what?
(To sneak in a more tricky question) What factors determine the diameter of the disk? I imagine that the eventual height of the center of gravity and the weight of the tube must play a role.
I guess you have deduced by now that I don't have a nice instruction manual - I am eagerly searching all your postings for any scraps of info that may come in handy. So, thanks for the patience!
++++++++++++++++++++++++++++ Koot Pieterse badjjp@puknet.puk.ac.za