I used some cheap diffusers and absorber off Amazon and put them on foam board in a frame so it was light weight to put up for serious listening. Eliminates glare and adds depth. I might build something automated some day. Liked it so much I put one over the fireplace on a secondary system. I didn’t like just the diffusion or just absorbers.
I used to have some Gik panels mounted on some aluminum planks, but they were too heavy to move.