Thanks to other members for their advice and inspiration - I whipped up a simple soundhole cover with a CD and a kitchen sponge using a box cutter and a glue gun. It took about 15 minutes. Works great, I think.View attachment 3685736
I just need to find a better looking sponge/foam for the strings above the nut. I've been getting wolf notes (overtones) without it. This blue sponge looks so bad -- does anyone know where I can find a black or dark brown sponge or foam for super cheap?
Home Depot. AC insulating foam.