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You need to look at the maximum expansion
and contraction of the acrylic, there is a recomended gap, the larger the piece
the more gap required because of expansion due to temperature.
Brian
My viewports aren't near as pretty as those, but here's another question.
Do they need to be that close ( .5 mm ) ? I've seen some that weren't anywhere
near that close, and I assumed you need a little space around the plexi for
sealer and possibly flex of the frame when diving deep. I am planning on
ordering the plexi 1/8 inch small, so there won't be any direct contact
between the plexi and steel. Am I screwing up? Frank
D.
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