I already have two 20amp circuits running into an attic space but I'm getting really tired of having to go down 2 flights of stairs to turn off breakers. Would it make sense/be ok to just install a subpanel near where both main branches enter the attic and put in two more 20amp breakers to act as a shutoff? I mean, I'd leave the breakers in the panel as well so essentially the circuits would have two breakers each.