Monte,
I like the older Jw's also. But I have one made in 2000 w/a flat-faced joint w/radial pin and it hits really solidly with the 2 original shafts, a little softer with the others I have for it. The original shafts on the older Jw and the one I have plays a little stiffer than your R12. I wish you lived closer, you could play with it and see the difference for yourself.
Dave