a little tech trick...
although Zip ties are great for the job... and they could be fun in a wierd way
..... lots of guys just go to the .99 cent store and buy a pakage of small bungee cords.... they are reuseable, disposable and you can hang the caliper 1 handed as opposed two needing 2 hands to lock in the zip tie..
they work great !! great info here for the Novice..