When building a cover for my Lehman what considerations should I take into 
account? Obviously air currents are the main thing I'm trying to cut out, 
but what about temperature and critters? The seismo is located inside a 
windowless room that is kept at a constant temperature year-round. I'm also 
hoping to use plexiglass, glass, or anything that I can see through. Is the 
thickness of the material used very crucial? Does anyone have any 
pre-construction tips or pointers that would be helpful?
-dan
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