I forgot to say that for shorter lengths of film, about 10-20 ft, a hand-cranked jobbie would be much less complex than a motor-driven one, not to mention far less expensive. The determining factor then would be the size of the tank. Different film widths could be handled by having a fixed bottom flange and a moveable top flange on the feed and takeup spools so you would only have to fill the tank deep enough for the particular film. The guide rollers, if any, would be constant and might not even be needed. In the Morse tank they were mainly to keep reversal film at a fixed distance from the exposure window. I have little experience at thermoforming large sheets of acrylic but more in forming PVC and Kydex (a PVC/acrylic alloy designed for easy thermoforming). It's too damned labour-intensive to make only one and making several means you have to be crazy to not make molds, probably of wood. Ideas? bye, sid.
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