So my captains chair begain creaking at the base. Tightened up all the bolts securing it to the floor, most were barely over hand tight. This made it a bit better, but still the creak every now and then. Its definately coming from where the base is mounted to the floor. Whats peoples thoughts of doubling up some plywood or maybe a sheet of 1/4" aluminum under the base to stiffen up the floor where the seat bolts down?