I use 2 foam core sheets against my wall & have 6 command hooks. Two at the left, center & right of the foam core(s). Add more hooks or space them to your liking. I then use heavy string & tie to the 1st command hook, place in front of the board. loop around the middle & then tie at the last hook. I use clear command hooks so when I need to move the foam core- I take the string down & leave the hooks up. Works like a charm.
sewverybusy1