Still working on getting a trailer. I'm planning on getting a 24' enclosed bumper pull, 10,000 GVW w/torsion axles. I am planning on installing E-track in the floor to secure my vehicle with straps over the wheels. Every where I have checked has E-track made of 12 gauge steel with screw holes about every three inches to mount the E-track. Most places are selling this as a product to secure cars, but is the 12 gauge steel hefty enough? Nobody has been able to give me some kind of working load limit for E-track. Also, any thoughts on attaching this to the 3/4" plywood floor using wood screws versus welding or bolting to the steel cross-members of the trailer frame? As I mentioned the E-track would be mounted using wood screws spaced about three inches apart the entire length of the track. Is this the "rookie" way of attaching it or is it really designed to mount to plywood and be able to secure a vehicle in transport? Thanks for the input!