Super nice job! I have followed your previous threads on this issue with much interest. I put several tug eyes in royalex boats, which were great. I have been reluctant to put the equivalent in composite boats with float chambers for the reasons previously discussed.
This has me rethinking it. Box adapters and reinforced vinyl tubing seems like the way to go. I see that you gflexed one end of the tubing to one box adapter, presumably before gflexing it to the hull. How did you gflex the second box adapter to the tubing? Is it loose enough to use gflex as lube? Which box adapter was gflexed into the hull first?
As you might have guessed from the Flashfire thread, I am fairly new to some aspects of composite canoes and can't seem to help but have some reluctance for fear of permanently messing up a beautiful (expensive) canoe. You've provided a lot of detail, but any further thoughts of advice would be appreciated.