Thanks for all the positive feedback!! I left out a few detalis about the rest of the cage (that is still ideas being hashed out by hub and I) but what I am hoping to do is build a seperated loft for their hay. It will be an elevated 2x2, but it won't be over the cage, it will be next to it, with a switchback ramp leading up to it. It will be on a grid stand with storage underneith. I'm really looking forward to adding it to see what the girls think. The other idea is hubbies, and it was to just do a 1x2 corridor into a 2x2 or 2x3 for their hay, and not have it elevated. While I think that is a good idea, I kind of have my heart set on the elevated one for some reason.
As far as the question of how many pieces of corroplast it took to buid the cage, it only took 2! It has 3.5 inch sides and the one end actually has a 5 inch wall. I went to the sign shop and ordered 3 pieces (because we also have aboy but I think my mom secretly wants to keep him at her house and he already has a 2x3 c&c there) and the girl said "Uhm, usually when people get this to make cages, they only need one piece", and then I had to go into my dimensions and stuff. Too funny. Also when buying fleece, the people always ask if I'm making a blanket or something, and are always surperised that I'm using it for my guinea pig cage. I've educated alot of people about cages and fleece just by explaining the dimensions of my cage and my reasoning for fleece v/s more disposable kinds of bedding, and why CEDER should never be used. It took 5.5 YARDS of fleece to cover the cage floor (with a little left over that had to be folded inwards). I got one nice set at $5-something a yard, and then I got a not patterned set for $2-something a yard.