I had placed velcro on the base for attaching to my case.
Today I wanted to put a humidifier in my sound hole (since we were at 2deg again and the furnace was cranking).
I thought of a better attachment, instead of my nylon screw and grommet idea.
I simply kept the velcro and used another strip of velcro to sandwich the strings. I shook the guitar and it didn't slip.