The burner flame caused the outside of the oven to get red-hot on a friend's oven. It was the usual "glow bar" scenario except more flame than usual found it's way around the heat shield and toward the side wall of the oven.
The picture below shows the results after baking about 5 pizzas in one night. As you can see, We're going to need some flat-black grill paint for a touch up.
Here's what I did to reduce the flame impingement. The picture below shows the burner with the center bolt removed. Note that if you attempt this fix, there is a locking nut on the underside of the supporting plate that must be removed first. After that, the center bolt can be removed (but it is threaded into the burner body). I cleaned up the burrs in the fluted cap and put the bolt back in.
Next I put a wedge between the bottom of the burner and the support plate. Sorry, I don't have a picture, but I used a little strap metal, the type with a pre-drilled hole. On the right side I doubled the metal strap causing the burner to sit a little canted toward the center of the platter and away from the glow bar.
I cut the glow bar away. (See instructions in earlier posts.)
Finally, I marked the heat shield in the area that is supposed to protect the outside surface from flame. I used a hammer to pound the heat shield metal toward the side wall about 1/2" so that it captured up more of the flame from the now-canted burner.
In the end, the red-hot sidewall was gone. The sidewall still got hot (~400F if I remember correctly), but nothing like the glowing red surface that blistered the paint. There may be a better fix, but in the short time available working with my buddies tools, it was good enough.
Some may be wondering if canting the burner toward the center of the platter increased the center-stone heat. Not that I detected with the IR gun or by the coloration of the bottom of the pizza. But remember, I didn't put a big wedge in there, just a smidge.