>>Can anyone give me info in createding a sliding door for the cage front? As far as i can figure out, it seems most people route out two slots in a door frame for the glass to slide into. I just can't figure out how wide of a board to use, i've heard of people using tracks for the glass to slide into, but when i asked someone at lowes or homedepot about this kinda setup, they had no clue about tracks for a "display case". I appreciate any info. Thank you!
Rockler has a couple of products which would work. I bought their plastic sliding door track for my latest project. They also have aluminum tracks. Woodworkers Hardware has self-adhesive finger-pulls for glass doors (similar to what you find on Vision cages). Look under "Knobs and Pulls", then "Specialty Pulls" for their glass door finger pulls.
If you want to build track yourself out of wood you'll need need to route two grooves big enough for the glass, plus a bit of extra space so the doors can move. I haven't done this, but I'd suggest you add 1/16th of an inch to the thickness of the glass to determine how wide the groove should be. I'd want at least an 1/8th inch of wood between the glass plates, as well as in front and behind. So, if you use 1/4" thick doors, you'd make the grooves 5/16ths wide, plus another 3/8ths for the wood in front of, between, and behind the glass. Minimum width would be 11/16ths.
That's the absolute minimum I'd start with. Better to have, say, a quarter-inch lip in front of and behind the doors/grooves and 3/16ths (or even a quarter-inch) between, especially if you expect to insert and remove the doors from the track on a regular basis.