As an electrician in Philadelphia, I install MANY boxes in old plaster and batten walls, while the usual "old" boxes for attaching to wall panels simply suffice due to unevenness and/ or depth of the wall paneling hardware on the inside of the wall will not work properly. Traditional metal ear boxes designed for fin mounting are not deep enough to accommodate dimmers, GFCIs, or other bulky devices. good results with the old treatment on the plaster strip between the nubs. In the end, the…