I think I would have rated the full circumnavigation as a Level 5 on that particular day and maybe a Level 4-5 for the shortened "circumcision" that some of us did.

I'm fine with the idea of an extreme Level 6 to balance the other 5 against, my concern is that it is just adding too much "clutter" to an already significantly expanded rating system. A Level 6 paddle, while it could exist, wouldn't likely be a posted Connyak paddle. The others would.