Hi Roo
Its funny that this topic comes up just now, cause I have been toying around with the zeppelin loop all week to find a better way of tying it. I have only been aware of option 1 (from your knot index) and always found it a bit awkward, as it is a two-step operation.
I came up with version 2 a few days ago and wondered if somebody else found it already as I have not seen it on the web. I was thinking of posting a question here and next thing I find this new thread.
I definitely prefer method 2, as it saves the trouble of tying an overhand knot first. Well, the overhand knot is tied in the process but you don't have to stop and re-arrange yourself. It is one smooth threading process with the standing end in one, the working end in the other hand.
I form a 6 and start threading the end through from the back, go around, thread it through the upper small loop from the back, form a 9 (the gray bit in the pic) and then the end needs to be threaded through the two eyes of the 6 and 9 as in the bend> done. With a little practice, this is a very smooth, quick AND memorable operation (after a few times, your hands do it automatically), which should make the loop more attractive for beginners. This is my preferred method since I found it.
It could help to promote the zeppelin loop more, which would be well deserved, considering all its merits: easily adjustable, reliable (strong and secure), non-jamming, can be tied around an object easily and with method 2 there is a quick (and fun) way to tie it too.
thanks for posting this