I recently bought a VP 150 after using a single M2 as a center speaker. Now I'm stuck with a single M2. Has anyone tried stacking an M2 on a M22. I'm now powering with an HK AVR 630, I don't have a room at the moment for a second zone, so am wondering about picking up another M2 for a zone 2, but maybe wiring it with my M22's to make a "hybrid" tower until I get a second room wired up. Anyone tried it-any thoughts?

M22's, VP150, QS4's, HK 630, HSU VTF3-MKII