I learned that a little of the e-trac goes a looong way. I actually put too many sections of it on my trailer and never use some of it. I'm going to take the extra back off because it's difficult to set gas cans, etc on top of it.
I use the ATK bike shoes. I mounted each one to a seperate piece of plywood. Then I put thread inserts in the bed of the trailer. I attach the plywood / shoes to the bed of the trailer using a thumb bolt down thru the plywood and into the thread insert. This system permits me to easily remove the shoes and have a nice flat trailer floor for hauling other things when I need to.
Good luck. Sometimes it's hard to stop farkling a trailer......jkm