A Marsal MB makes a phenomenal pizza in 4 minutes? Really? Who knew? I'm shocked!
Seriously, though, John, I'm really happy to see you pushing the boundaries of the MB and producing such a stunning looking pie. The feedback is also incredibly helpful, since, even though I recommend the MBs quite a lot, and some members have opted for them, we don't get a huge amount of feedback of how they perform in the real world.
If you do another 4 minute bake, could you get an upskirt shot? I trust you when you say that it's a balanced bake, but I'd like to see exactly how the browning on the undercrust looks at that bake time. Believe it or not, with all the discussion this forum has had on the MBs I think you are the first person to post a photo of a 4 minute bake with one.
What flour are you using? Are you still blending?
And, lastly, I might be a little biased, but that pizza looks incredibly profitable to me. Are you tempted at all to sell that rather than your 6-7 minute pies?