Thanks for the input guys and for the photos, has given me more food for thought. The biggest question is, do I go for 9 or 18 point cell, both are doable from a mechanical perspective, though the 9 point cell is more simple obviously and from what Mark has said, should be sufficient support for the weight of a sandwich mirror.
With the edge support, am thinking that instead of rollers, just having nylon pads a little longer than the thickness of the mirror. Should be slippery enough to allow the mirror to move without too much friction that may distort the mirror.
Happy to take onboard any other insights or suggestions that may be forthcoming.
Cheers
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