I've had this on for about a year
Step 1: Picking Out a Command Hook
I bought these walmart for under 5$
Step 2: Stick It to the Ukulele
make sure the opening of the hook is facing the right direction
Step 3: Add a Strap
I made one out of an old tshirt using the many finger knitting tutorials on instructables.i tied one end around the headstock and the other around the hook.
Step 4: Done
I haven't removed it cause there hasn't been a need to.and the ukulele it's on is fairly inexpensive,so I'm not worried about damage.
it's worked great so far.