With no heat or moisture involved in your process I suspect that fibres are being snapped, or at least gently pulled apart without showing damage on the surface. This would weaken the wood but does that really matter in modelling? I don't think so.
I have found that the wood is very severely weakened by those bending tools like pliers that crimp the planks repeatedly but they have been on sale forever, usually from the kit manufacturers themselves so I guess they work satisfactorily.
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@AllanKP69, I'm interested to see how your machine works on a plank that has been spiled and edge bent already. I guess it would be fine because of the width of the rollers.
Oh, another point that you might like to try would be tightening down the upper roller on one side only. The rubber would allow for a little 'conical rolling' and maybe that would put an edge bend in at the same time as the face bend?
I think you should press on with a few more experiments before making a better video and then going for crowdfunding. This time next year Gene, you could be a millionaire!
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