im thinking of building one too seems like 3/4" plywood sealed with resin would be good way to go then was thinkin about making out of aluminum definatly not useing 2x4's or metal straps to hold together as ive seen on some other extentions
I was going to make one several years ago. I called Ranger to see if they still could make them , but they could not. They did however offer me a copy of the blue prints for one that they had on file. You can call and see if they still have these documents. I never followed through with it.