Jim, yet more examples of your creativity! Good work!

I like your idea of creating the extra friction by threading the line through the bull hitch. I didn't know that one so did a search and came up with
Bull Hitch.
. . . much more robust than the rubber-band idea!

Question: Instead of the anchor hitch (one of my very favorite knots), would a half double fisherman’s (aka double overhand loop) be cleaner? It would have the ends parallel with the vertical lines and thus have a smaller profile.

In fact, depending on the slipperiness of the cord, a half fisherman's (half "single" fisherman's) (aka overhand loop (slip knot)) should do it.

In any case, I suggest not using a stopper for either the anchor hitch or the double overhand (again, lower profile): Both of those knots will bind down tightly and not slip . . . depends on the cord used, though. I would think that the heat-sealed ends should do anything needed.

Jim W,

I agree that the Anchor Hitch with stopper doesn't have the smoothest profile. As soon as the heat dissipated on my knot, I realized that a smooth knot is needed. The half double fisherman makes perfect sense and is how I would tie this in the future. I also like your idea about skipping the stopper and melt as is.

I worked out the shortcut on connecting the throwline to a Bull Hitch for the purpose of making a weight releasable.

These are the steps in general terms:
1) Pull a bite of line through the ring
2) Thread the Bull Hitch
3) Pull tight and dress

The result is a Munter Hitch on the top of the ring and the line held by the Bull Hitch on the bottom.

This photo illustrates the Jim W improvement and the path of threading the throw line.

This photo shows the bite of line pulled through the ring (step 1). The line is ready to thread (step 2). Though not photographed, the line is pulled tight and dressed to make it functional (step 3).