Two suggestions: 1) as Mercy and Kevin suggested, the rails make it easier to work with odd stud configurations, and 2) get a CH Hanson magnetic stud finder (http://www.amazon.com/dp/B000IKK0OI/?tag=atomicindus08-20). It locates the drywall screws and made hanging my Gladiator stuff go from a...
My gladiator workbenches (bamboo top) have a slight, but equal overhang on the front and back. The power strip is a good idea for a backstop since it attaches directly to the back of the bench.
Looks great. I am about to hang my cabinets above the work bench as well. What is the distance from top of workbench to top of lower gear track channel?