I think it really is a leader that Krantz is referring to. I use a piece of spectra- 1/8 or 7/64 with an eyesplice that is put through the middle of the spin sheets then I tie that piece of spectra onto the clew of the spin. The ends of the spin sheets are then tied together on the tramp. I might have a pic sitting around somwhere.
I would like to do it the way Krantz mentions and do eye splices in the ends of the sheets and then use a piece of spectra to the clew but other than apex and maybe that robline he likes there aren't a lot of single braid line that works for spin sheets that you can do that with. I like my set up now other than the knot on the tramp. The benefit of my setup - and krantz- is that there are no knots on the clew of the spin to deform it in light winds and get caught on the forestays during gybes

I apologize for the large size... but it has to be big to see it. You can see my spin sheets at the top of the hoop.