The Cornerhorns seem like such a cool idea... however when we tour I plan to grab one of the Three Pis and use it as a keyboard monitor cabinet... Also when we play smaller venues we will sometimes need to bring our PA... The mounting as such in the studio is out of necessity. I am building the shelves for them to sit on... which are in the corners which have sort of a bass trap in them at sort of a 45 degree angle... so the flat back of the speaker will largely be up against that.
I will be building the cabs to be road-worth with handles and such... much like the TL606 and TL806 designs I build for bass and guitar: