Hi all, thank you to everyone for there input. Here is what I came up with, I poured a counter balance to attach to the back part of the bridge just past the pivot point. its 7"W X 9"LX 31/2" thick. I am not sure what the weight will be but its more then that's there now. I also ordered the 10" Linear-Actuator just because they are out of 6" and 8".
I am not sure what the bridge weights cause I didn't right it down like a fool. Stan if I just use a DPDT switch I would wire the limit switches just as before correct?
As far as the pivot point there are sealed bearings on each side.