From what I can tell, the change is only the to the locking barrel, not the actual signal path itself, so there shouldn't be any change aside from the better clearances. The photos are from the original release of the PCA's (the old ones), but without an old and a new side by side (or the opportunity to plug a few of them in next to each other) I'd be hard pressed to tell the two apart.

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gonk -- Saloon Links | Pre/Pro Comparison Chart | 950 Review