I have decided to use a BendPak xpr 10 2 post lift in the second bay of my garage. ( I have an Advantage 4 poster in the other bay and I am very pleased with it). My question is, to install a symmetrical or asymmetrical unit? I will be using it to work mostly on fabricating my hot rods so I am leaning toward the symmetrical unit. Any advice would be welcome. Thanks ahead of time, James.