Well, Jason (@mr2m1) generously offered to replace or refund my Glove Box insert, but since I don't have a show rig, I was gonna make this one work. Some grinding on the seam tack welds worked fine to allow the top of the insert to 'lift' a fraction more. Not pretty (since painted), but works fine and cuts disappear when installed. Striker was still slightly hitting the bottom of the lock, so had to place the door hinge UNDER the insert flange and that seems to have solved it.
My guess is the original cardboard insert allowed for much greater tolerances in that opening.
My humble suggestion might be to design in some 'adjustability' in future runs, if possible? Anyway, this is a heavy duty insert. I actually think the sheet steel could be one-gauge thinner without sacrificing anything, and perhaps, even, facilitate install if some 'adjustments' are required.
Insert currently is being painted and will show when dry and reinstalled.
Cheers for another great solution !
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