I carry a nylon/velcro compression cinch strap, and an assortment of bits to attach mics to. I don't use it all that often, but, when I need it, it certainly saves the day.
Wrap around post, and tighten down; making sure that I have my adaptors "cinched" behind the strap, sandwiched between strap and post.
mine is black, as opposed to this blue strap.