Nice looking knife. I like that feature-striped Ebony!!
I have noticed the slightly raised backspring on GECs, only a thou or so.
I took out about 20 unused Case knives, mostly XX era, and a couple of 2000 era knives. They have the same slight variance, either opened or closed. You can barely feel it with your fingernail.
It will be flush in one position, and slightly raised, either open or closed.
We may be making too much of this condition on production knives. There are always examples of perfect fit, but considering the several "cleaning" and polishing steps, and the slight irregularity of the tang edge from the punch dies, it's a miracle they get the drilling as centered as they do!
If you could put a file across the tang when the knife is assembled, you could fine tune it, but after assembly, it is unreachable.