Out of curiosity, how does the air compressor method work?
Using a hand controlled compressor attachment with a small nozzle, get about half INCH of the grip started on the bar. Then fit as much of the attachment under the grip (on the inside part of it - that you started on the bar) and give it some air.
The air will spread open the grip and let you slide it on easily. It takes a little wiggling and reposition of the compressor end, but it does make it quite nice.
IME, I've noticed that making sure the bar end is completely clean and dry also makes a difference. I use either contact or brake cleaner followed by alcohol (the rubbing kind
). I then use a small wooden dowl (or a popsicle stick this time of year
) and smear a small amount of grip glue 1/3 and 2/3 on the inside of the grip in a circle. That stuff is strong, messy, and spreads easily, so a little goes a long way but move quickly since some of it tends to dry quite quickly.
But.... that's just me. I've seen and heard of the safety wiring method, but I honestly never had a use for it.