yeah, does anyone know if you can buy trhem for caes that arent featherland? like kings?

Here is the cage I have:
FeatherLand Folding Bird Cages and Play Gyms

Here is the playtop that came with it:
FeatherLand Folding Bird Cages and Play Gyms

Here is the external feeder:
FeatherLand Folding Bird Cages and Play Gyms

I got mine at a birdfair at Memphis. I got the cage and the playtop NEW and ASSEMBLED! for $300.00 (no tax. )
I ordered the external feeder.
I am not sure if all those sizes are correct, I'm not sitting in front of it right now, I think it's a 21 deep by 30 long.
But, anyway I love it. Especially the way the seed tray hooks together. I might take some pix of it and post later if you want. I especially love the way the playtop lays out with the perches and the toy holder that's not shown in the links I put up.

As for being able to fit other cages, it might be possible. Dunno. This one has 4 pins that lock into place where the door is removed from. Two are springloaded and pop into the slots.

Beside the plastic coasters, I've been very happy with it. Cleo appears to love it as well. LOL
Mark

What a great deal. I wish we had some big bird shows nearby. I just watched the video. Was it really that easy to assemble?

Well, mine was already assembled.
But that video sure makes it look simple doesn't it?