Well all im gonna say is I always take the cover off and sit it on top of 2 cinder blocks one on each side
I took it off and was walking backwards and well the cinder block tripped me, and it went down with me. landing just on that corner.
Of course like a loving husband I blamed my wife for not helping me
And that is the way it has always sat. Even had a friend who installs them look at it and he said that was normal for some reason
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