It wasn't as open and shut as I had hoped, I got a completely new revision of the Westwood that definitely had a few changes compared to the older version. The first one was through-hole, the new one was SMD.
The treble pot is connected how we suspected it should be, but I can't say that the V1 Sherwood was incorrect because there were few other changes that I can confirm are different from the earlier version of the Westwood.
Some of the component values in the gyrators are different (although their structure is the same), and I know those were correct in the V1 because I still have photos of the components from that version.
So basically, this didn't definitively tell us that the Sherwood V1 was incorrect or correct, but I can without a doubt say that the V2 is now correct.