Re: cat-proof screens?
Take the screens to a glass shop and have them strung with aluminum screen instead of the standard fabric. The cats might be able to deform the screen a bit, but they're not going to claw through it. After that, get yourself a squirt gun or spray bottle and fill it with water. When you see the cats starting to go at the screen, squirt them. Shouldn't take but a few times to cure them of clawing the screens.
I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!