The "fibre board" I've seen around is is used for notice boards etc. Takes a drawing pin easily but too soft for much else. Oil tempered hardboard stays flat but is quite a lot dearer than the standard stuff
================================== This is a different type of fibre board. It's not like the thick (1/2") notice board stuff. Nor is it hardboard. It looks and works a bit like the material used for those old cheap fibre suitcases - it might actually be the same thing.
You'll see it in the dash and door panels of old Minis and in the boot linings of cheap old cars.
Cic.
Don't use a clamp, put some soft cushion material on the thing and place heavy weights on it.
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