Hi Eric,
Do you really see Whatknot there? I only see nipping loops! 
About your last post, do you think a Surgeon Bend will perform better than the Reef?
But above all, please try tying these variations (look at the attached pictures). They are based on a 3 nubs structure, two Standard Bowlines and the central part is formed by a 2 bights locking mechanism that bites/locks the 2 ends (after that we could retuck the ends through the nipping loops but perhaps the bend becomes too bulky…). We can tie the internal hitches close to the nipping loop of their loop, or close to the nipping loop of the other loop. I don’t know which will perform better in Dyneema…
Here the 4 variations.
If the bends are not in tension the ends could not be so stable, we could add other turns (as in ABoK#523) or we could tuck the ends through the nipping loops or through the collars…
Ciao,
s.
