Mates,
I have 2 PRS with a non-adjustable stop tail where the strings will not touch the frets even with the bridge screwed all the way down. I think this is mainly due to the shallow neck angle on PRS. Now, the strings do get plenty low, but I would prefer a tad lower.
I don't know of any bridges out there with less height than a PRS non-adjustable stoptail that fit a PRS (even the so called Golden Age low profile bridge from Stew Mac, which has adjustable saddles and is likely thicker/taller). Also, PRS has the rather unique 10" radius.
There is very little to the base of the studs, so shaving them down is not really an option.
I had a talk with John Mann today (MannMade bridges), who told me he noticed the same issue. His studs have .003" less mass at the base than PRS for this reason. Helpful gain, but not much.
John Mann suggested what I was also thinking...file the string slots down to taste. He advised that all PRS string slots are 1/16" (or about 1.5mm).
In that regard, I found a very helpful set of round files. See link below.
https://www.riogrande.com/product/micro-shaper-round-diamond-file-set-240-mesh-set-of-4/114814GP/?code=114814
I presume you could also use a nut file @ .056" or .065"
I ordered the round files and will report back my results.
If anyone else has noticed this, please let me know.
Thanks