C&C Where do you get the clear walls?

I'm assuming you're talking about plexiglass, which is available from hardware and home improvement stores. You just need a drill to put holes in it to run the zip-ties through.

Okei. Thank you.

Home Depot have them too. They are very expensive when you get the pre-measured ones on the shelves. Some large sign companies have them too and they are cheaper. I wanted to see my piggies and I did not replace the grid with the plastic, but replaced half of the coroplast side with the plexiglass/acrylic panel. I wanted them to each get light in the multi cage unit that I build. There is a person on eBay that does the half plexiglass in the appropriate size of a grid. The holes are already drill in them. He charges $29 for six. I will see if I can find the site and get back to you.
BTW, when I attempted to drill holes in mines it cracked. So I will think that you will need to also consider thickness of the plexiglass/acrylic panel. I just clip my on to the grid and it worked for me. I only needed to use it on the long side of the cage.

It won't crack when you drill it if you drill a pilot hole with a very small bit, then enlarge the hole with a larger bit.

The cage store sells them too, cut to the same size as the grids.

https://www.guineapigcagesstore.com/pigture-window#.VShHj5N9OM8

Thank you bpatters! I will try that and see how it comes out. It will also save me some grid for the other cage that I am building.

[/QUOTE]The cage store sells them too, cut to the same size as the grids.

https://www.guineapigcagesstore.com/p...w#.VShHj5N9OM8

I checked into this lunarminx and they do sell them but at $8+ a panel it's too steep for me. I find that home Depot is way cheaper.