Mark,
As Klik noted, the round-nose Core-Lokts haven't changed, as they still have the same very thick jacket along the shank, and still work very well.
But the Pointed Soft-Point Core-Lokts has their jackets thinned considerably maybe 20 years ago, and are now just basic cup-and-cores, unlike the older PSP's.
Aha! That's what I was thinking of. Thanks for the clarification, John.
