In our apartment complex *3 floor Condo* built in the early 70's, the Power supply and Zinsco BMT 15-3 meter stacks (4) were installed. One stack is failing on one side. ie 110 is OK on one side, but very sporadic on the other side. These meter stacks go to 12 apartments, so We need sound advice. Should we even be looking at a refurbished stack.... we're thinking NO. So as we wait for the furnace to kick on... do we replace the 4 meter stacks and also the Power supply ? What particular product would you suggest ? Not looking for Cheap. We have that now.