Cal Audio Alpha-Delta, Anyone Stack Them?

I've always had mine side by side but thinking of stacking them in an upcoming re-configuring once my PS Audio 300 returns. I would put the DAC on top. Opinions would be appreciated. Thanks.
I wouldn't do that, the world might blow up!
Stacking works fine for me. I have Herbies footers under the Delta and between the Delta and Alpha units, just to help sop up any nasty vibes.
Thanks gentlemen. Zar