Right then, I had a look at the board, I inserted it upside down and pushed it around a bit. the furry stuff looks in pretty good shape around the top and bottom of the case. With moderate force the board will move sideways about fifteen mil either way at the tip. this is just enough to open up a visible gap between the board and the furry stuff. The board is about twelve mil shorter than the case, this means that the tip will move aft about ten centimeters (as it obviously does from the wear marks on the board). with the board pushed aft there is a gap that will take a pencil comfortably at the leading edge.
I guess I've answered my own question, the board is a poor fit, question is what can I do about it??
I'd really appreciate some thoughts,
Howie