Thanks guys, I'm thinking the 3 hole thing is correct for the '3A. The bean counters probably saved a few pennies for that change from the 5 weldnuts on the '2A. 55, that's a good idea, i'll try those "U" clips/tinnerman with some sheet metal screws. The existing holes show no signs of sheet metal screws "threading" the holes, so I don't know how the fasteners stuck in there.