greg
Greg,
There is one method that has proved very effective and accomplish a
beautiful wall finish at the same time.
Instead of making holes and patching, consider a surface mounted
acoustical treatment and architectural stretch fabric.
Check out www.SoundNice.net. They invented and patented this system 25
years ago.
BeachKing
I was making stretched fabric in picture like frames 30 years ago.
I also made a bigger frame using 2X4's and put pegboard on the front.
But, I wanted to see if anybody was making integral gadgets for
construction purposes.
I had a nice cheap place I bought fabric and foam from a long time ago.
I wish they were still around.
greg