I finally finished the bike trailer i started last year. I had it brazed and assembled, but it needed paint and a decent floor (though i used it a couple of times with a canvas floor). It’s made from 2 mixte frames cut up and re-assembled, a fork for the hitch and 20″ front wheels from scrap kid bikes. The only new parts are the tubes and tires, and most of the various mounting hardware.
I welded a really crappy mount for my 3-speed bike, but i’m planning to build a better one after my welding class. The threaded section of the fork looks like the weak point, it wrinkled a little when i tried to pull the fork legs to the side to level the trailer. Might be fine with typical grocery loads, it didn’t budge when pulling 100lbs of kid down the bumpy alley.