I was doing a mid-season clean of our T5 today, and when I had the pipes off, I took a look at the exhaust opening on top of the stove. I saw the familiar bolt on the heat shield sticking out, and also noticed a notch in the opening. I lifted the bolt and it seated nicely in the notch, and lifted the heat shield. Now I am wondering if it was meant to be that way all along. As always, and help would be appreciated.