Profile tolerance application where material thickness tolerance impacts line location

[KipWiseman]

I am familiar with the Y14.5 standard. My question is this:

Material: 2.0mm +/-.15 thickness tolerance
Datum A is opposite side of die plane
Trim tolerance is profile of line +/-.3 (.6 in box) from ABC
B&C RFS

My concern is the customer has the A plane opposite side of forming side. Where thickness tolerance now has direct influence to the final position of the trim line.

 

[3DDave]

The ASME Y14.5 standard applies to the finished part, regardless of how it's made. Without seeing the configuration or the reason for the small trim tolerance I cannot make a good suggestion.