Nice thought, but CPUs still heat up and, at a minimum, require passive heatsinks that need to shed that heat. If you partially seal up that amp, then that heat can end up becoming damaging.i have a cover that came with my TMDR and recently i thought up something about it. computer components are damaged by cigarette smoke and dust. and probably other environmental issues. the tonemaster doesn't put out much heat. here in my home, i could take that cover and cut out a circle in front of the speaker, cut a small circle for the input jack, and a small circle for the on/off switches. then i could just put the cover on the amp and leave it there.
i doubt i'll do it, though.