Apologies for the quality of the images...I realize the irony inherent in the fact that I am posting images of a Manfrotto taken on a cellphone camera. I don't have a real digital camera though.
So I did much like Air did for the top:
I tried just putting the strap through with the small head mount removed:
But I decided that I like having the small head mount for those times when I want to go minimalistic, so I'm going to try this:
Which has a ring zip tied to the center column in between the end of the head mount and the little release button so it can't slide much. I am a little concerned about the zip tie, but I have used these things to fix everything imaginable, and these are "industrial strength" to boot. We'll see. If it falls a little, eh, it is a Manfrotto. It will keep fighting. What a stud.