IIRC it’s 12.5mm Nathan.  The WS one is the same as whatever the Tormek bar is.  I think the short gouge jig will probably work with anything close though since it doesn’t actually slide over the bar.  I have the original toolrest at home so I can check tonight and verify.

FYI, Tormek has a kit to attach their bar to any angle grinder that could pretty easily be fit to the WS.  If the short angle jig is the only tormek jig you’re interested in though, I don’t believe it’s necessary.

If I were you, I’d start looking at making a table for it unless you got lucky enough for yours to have one.  The table makes a world of difference for planes.

YOU SUCK