Just a few clarifications about nipping structure's complexity.
1. First level, simple nipping loop (one twist), example:Scott's locked bowline.
2. Second level, crossing knot (two twists), example: Karash bowline.
3. Third level, Shaped eight(?) (three twists), example:Your original post bowline.
It seems that you have advanced from first to third, and i was curious about the second.
Would a karash bowline, enhanced with your locking mechanism, meet your security standards?
As you see, i meant downgrading the complexity by one order/level.