So I ran off to projectilepoints.net to check and though there are very few examples of this cluster shown for comparison, from descriptions, I can see a lot of similarities.
The herring-bone style matches a couple of examples (but some have random pattern) and the size is an approximate match.
Location is on the money too.
Only thing that seems different enough to mention is that my point has a clear concave base and the B.V. cluster points don't , as far as I can see.
Also no mention of heavy basel grinding in descriptions of B.V. cluster, but it's apparent on this example, I think.
I'm not experienced enough to understand how much latitude is allowed in interpretation.
This example has a very short (though precise) base, with a subtle but very symmetrical notch.
Definitely concave.
I'm very happy to name it Big Valley (if I think I can get away with it) and am very grateful for your take on it.
Thanks.
I think it's a top find.