Guys, this might sound like bragging, but I have been building things all of my life, with quite a bit of success. I give each thing a lot of thought as to how strong it has to be for its application. I`ve partially rebuilt òffroad`log trailers that had to carry double the legal weight, twenty four hours a day, and tandem gravel trailers, and biggish farm equipment.
These tires will only have 15 lbs. of air pressure, travel at 2 - 3 mph. and mostly have very little torque on them.
Anyhow, I did a bit more welding today, but mostly I fired up my sand screener and scraped a dry layer of sand up (about 1 1/2 -2 inches) between rain showers. I got a wheelbarrow full.