Hi Will
I'll take some pics and post them!
One thing I forgot to mention is how easy it is to get this loop/knot to tighten fully up to the nock. With a heavy bow it was always hard to get the bowyers knot to fully pull tight against the nock so I would file the belly side of the slot to a more acute angle.
The sole surviving nock from the 'Mary Rose' only angles down slightly and this knot slides up easily to suit that shape!
OK, tried some pics but the camera is not good enough to pick up the details.
I'll try to explain it better and anyone with a side nock and a length of cord can try it out!
The idea is to create a small loop at one end of the cord ( about the same circumference as a pencil)
You can do this with an overhand knot on the bite ( which means fold the cord back on itself and tie the knot into both strands)
It can be hard to get the loop formed small enough but if you adjust it before pulling tight, its easier.
Then you thread the other end of the cord through the loop which creates the sliding loop you put around the nock!
I've also tried a running bowline which works just as well. Which raises the question, why would it be called a Bowline if not for use on a bow!
These knots are easy to tie, just google a knot site and view the simple steps.
I guarantee if you try one of these knots out on your bow with side nocks, you will find it easier to string and unstring and no more slipping of the top bowyers knot.
Still use a bowyers knot on the lower limb to enable adjustment