The place you get the glass from can cut it. I paid about 25 dollars for the peice in the front of my boa cage. Plexiglass will be much more expensive. If you have a substrate it will be an ongoing battle to keep it out of the tracks. Not really. The bowing will be in the center of the panel and having support on one side will not make much difference. 3/4 of an inch isn't much overlap. I would go at least 3-4 inches Coloring and sealing are two different products. For the color on mine I use Minwax stain, color is "Colonial Maple", followed by several coats of minwax Polycrylic. I have seen some very nice enclosures made from both cedar and pine. The sealant encloses them. You have about 5 minutes after posting to edit your posts. After that its locked. This keeps people who are spouting nonsense from going back and changing their posts to deny it. Actually polycrylic is safe a few days after it is dry. Thats one of the reasons we recommend it over oil based polyurethane. Thats the stuff that takes weeks before its useable.