With the ASAT that weighs in at 4.5 kg, the sticky strap makes my shirt bunch up holding the neck in place...
You just have to play that one topless!
After all, you do live in the "Sunshine State"

You could have fitted two for even better balance.
Somewhere online years ago, I saw a guy selling little sand bags that hook onto the bottom strap button!
May be effective, but just silly!