Hahaha Johnny,
that photo was taken the day i got the Wiz, about a week later i thought it was time I bought a matching cab, so I got in contact with some people i know and ended up buying one of Chris Cheney's (from The Living End) Wizard cabs.
4x12 with Rock 20s! great sounding cab, loving the early breakup tones, but the Greenbacks in the Marshall just sound bigger and brighter, so im thinking i might chuck them in the Wizard cab like you did and see how i go! i need to get a hold of a square screw driver first.
The best tones i find are running the wiz into both cabs tho. Have the openess of the backs on top with the R20s pulling it all in and adding some tightness in there too
and heres the completed rig