I'm lucky I just needed to open a couple of cases and find my vernier calipers to take a measurement or two :-)
The tail piece on the 57 Goldtop is .7" wide. The PRS tailpiece/bridge is 1" hence the strings double wound bit is kept well within the PRS bridge.
Of course Joe willingly admits that the reverse wrap idea goes back to Jimmy Page and probably a few others. I've always wondered about people who describe a guitar as having nice tension. i.e. = Scale length, = string gauge and = pitch must mean = tension surely. But then when you pick up a PRS it feels easier to play and the scale length is slightly longer than a Les Paul so the reverse should be true - given equal string gauge. Maybe the break angle over the bridge and nut really do have an impact. The PRS has a lower angle at both ends than a Les Paul. The PRS also runs the string more directly to the tuners on all strings.
Just wondered if the Dean Markley strings Joe uses have a shorter double winding compared to other brands.
Pete