I had the glass cut at a local glass shop, had them polish the edges, and placed it onto the lip for the screen top. I then use spacers to make up the difference for the lock down tabs that hold the screen down. I drilled the glass with glass bits, and use wing nuts to hold the RHP in place. I wanted to make it easy to remove and adjust if I decided to use them for another animal species once the boas in them outgrow that particular sized enclosure.
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Reptiles Make The World Go Round.