thanks for all of the advice so far. definitely a lot of things to try out this weekend.
the boltsnap is attached to a short piece of cord that is around the tank neck, not the bungee loop itself. the bungee loop is constructed similar to the way Rob attached his. i did use the same white nylon cord for both the tank clips and the loop, which may be a little confusing in the video.
I'm not sure I see it well, but it seems your looped bungee has a bolt snap clipped to the tank valve.
the boltsnap is attached to a short piece of cord that is around the tank neck, not the bungee loop itself. the bungee loop is constructed similar to the way Rob attached his. i did use the same white nylon cord for both the tank clips and the loop, which may be a little confusing in the video.