Yep, insert and remove while in the air. Also, I found that the way NH attached the chain to the pin always interfered with my hand in getting the pin out. On both pins, I squeezed the first chain link, the one that attached to the pin, so that I could better get my hand around the pin top to pull it out. I think I scratched the pin up or chipped off the plating because I recall putting some gold spray paint back on the link and where it was welded to the pin.
More recently I discoved something called "Super Lube" dri-film lubricant. This spray on lube contains PTFE and maybe some wax or other lubricant. It sprays on wet, but dries within a few seconds and leaves a very dry slippery coating. I've use this on the pins and also on the lower three point arm extension mechanism. On these, the extensions quickly now slide back into the normal position as soon as I pick up the implement. Other dri-lubes I've tried still seem to leave a wet residue, but not this stuff. Trouble is, I can't seem to find it locally anymore.