That is a good observation about the wagons. I have a 32 yr. old Alumacraft V16. It is riveted and I have 1 that leaks about an ounce of water in about 5 minutes but only if I am on plane. I fixed it and lasted 5 yrs. with some caulk. I would go rivet cause I can fix them. A weld is a big price tag to fix.

But the fruits of the spirit is love, joy, peace, patience, kindness, goodness,faithfulness, Gentleness and self control. Against such things there is no law. Galations 5: 22&23