So taking a hint from Yukon with his "Yackle" (and further by oldgringo in the thread) -
Here are the dimensions -
The issue is this -
When loaded, the shackles bind up like so. Contemplating stitching on a portion of the milked part? Maybe a full rework from another busy-minded individual like myself.
A perfect solution would be to simply interlock 2 soft shackles, but what's the fun in that