Hi - I got the metal straight edge. Due to the half moon door shape, it was hard to determine if the top of the stove is flat. However, I can clearly see it is not a flat surface. It has warped out at the bottom where the air booster is. Suggestions?I could hear the whirling sound in your video. I’m not sure what that is, so I don’t want to speculate on the fix for it.
About your dollar bill test, I would get a metal straight edge and lay it across stove face to make sure that stove face has no warps in it. This is probably not the case for you but a good thing to rule out anyway.