Enclosed is a picture of my 19" F/4 1" thick slumped mirror.It's resting on a 21" diameter 1.5" thick bondo pad that will give full support(with cushioning). I would appreciate some thoughts on how I can provide lateral support to keep the mirror in collimation(and final figuring). One of the pictures shows a piece of angle that I may use and thread a plastic bolt to adjust or center the mirror for collimation.I also plan to drill holes thru the bondo and wood to provide air movement under the mirror via a fan.
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