It's because I was able to mount the monitor properly the second time around.
My wife found out about my plan to decase, or as she put it "tear apart", the brand new 21" I bought for the cab, and objected to that plan.
That forced me to redesign my cab to fit the 21" with the case on, which wouldn't allow me to mount the monitor leaning back from the front glass far enough.
The layback is what gets you the larger "window" on the front glass.
Your bezel has to travel farther, so it can do it at an angle.
As was mentioned earlier, you can go with smoked acrylic, and just paint the back black to hide the edges of the bezel.
If you get a back on the cab, and use black on everything inside, you can barely see it through the smoked glass.