I mentioned the neck humbucker mount rings not fitting the high arch on this model. (Page 2 post #16 & #19)
I manufactured one using the supplied ring and adding material with strips from a spare ring with acetone, but I'm not happy with the result, so I bought another 'bridge' mounting ring, as it has enough 'meat' to reshape it.
I used the one I manufactured as a template to scribe the arcs and these photos show just how high the arch is on this model - higher than an LP.
This first image is taken from the bridge side - the supplied mounting ring on top. The bottom one shows the arc scribed on a bridge mounting ring, ready to shape.
This image is taken from the neck side. Again, supplied ring on top.
I'd be interested to know if anybody has built a PBG version of a PRS-1TS to see if they had a similar issue.