There is also this modified Ashley stopper that is said to slip less on Amsteel-like slippery cords: slip the regular ABoK #526 and tuck the tail through the last eye.
https://youtube.com/shorts/ii4c7aRonOQ
Not sure how effective it may be...
Not sure who "said" it was less slippery
--or, more to the point, that Ashely's Stopper
slips!? (It's vulnerability is to pulling through.)
One can form a like knot in which the U-turned
S.Part goes around one side :: just reverse the
handedness of the OH tied around the S.Part
after it makes its U-turn.
--dl*
====