How wide is the back of the M22? The VP100 is pretty much identical in size only one edge is straight back from the front to allow a different horizontal placement opposed to the 2 slanted sides the M22 has. Just guessing you should be close if you subtract about 1" off the front face of the M22. When I get home in about 4hrs I will measure the VP100 for you just to be more precise, unless someone beats me to it.

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70