HansFranz, you might be able to make the lens fit more correctly by loosening the fascia bolts and adjusting the position of the fascia and the lens. Click here for tips on adjusting the fascia. You can also adjust the position of the entire display board and fascia assembly independently of the case and handle, as described here. Perhaps after you've adjusted things a bit, it will look more "even" and the frosted edges will line up with the face a little better.
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Tony Fabris