That is the nature of the Kibler SMR toe area since there is a built-in slight curve. When you position the toe plate in the inlet have you pressed the middle of the plate to see how much of a gap can be eliminated and how much the toe plate is disfigured by doing so? A slight bend in the middle may not be noticeable at all when filler of any kind may be much more obvious. Maybe post two pictures with the toe plate. One with it laying in place with no pressure and the next with you applying pressure at the low spot. It may not be as bad as you think.
That is a good point, and I was aware of it. But I thought I'd gone too far. I'll try and get the pictures as you suggested later.