So I'm having issues with stuff not being flat, and it affects cutting.
I'm thinking about trying a simple vacuum clamping to hold stock flat - but wondering what I should make it from?
Obviously steel would work well, but I cannot machine steel, even aluminium might pose a problem to machine for me.
Would fiberglassing the surface work? Silicone? I've tried a welding cloth/blanket above the wooden base the machine is on (fiberglass up, metal down, to reduce reflections) and it seems to be able to withstand the laser, albeit it does change colour and texture.
Ideally something that I could inexpensively and easily replace as the surface, suggestions?