Stacking AP Cages and Cage Casters

I’ve already emailed AP but thought of something different after emailing them and I don’t want to send too many emails in a row.

Would it be safe to stack an A20 (4x2x3) on top of 4 T8s (4x2x1)?

If so, would cage casters on the lowest T8 be able to support the weight of all 5 cages (plus a couple inches of substrate in each, hides and some branches)? I’m guessing not but I wanted to check. If not, is there maybe something else I can buy with wheels that would be strong enough?

This all might not be possible anyway because the A20 is the original cage style, and the T8’s are APS line cages. I did ask AP a while back if the two cage lines were stackable but never received a response.

Call them and they usually answer. If not leave a message and they will call back. They NEVER respond to emails.