Do you spot weld these units into place?
How about a couple of different angled pictures for us curious types?

Nope, NO WELDING..... everything is riveted up on those wings at the front of the bed. Rivets can hold out 700 pounds each so the quick math would be 32 rivets per side = just slightly over 11 tons of holding power per side. Then, those wings sandwich between the bed tabs up front and you use the stainless steel bolts through all that. The rear window becomes a structural member when you urethane sealer it in. There are 4 of the 1/4 inch thick c channels supports under the floor with a combo of rivets and bolts with them. I'd say we don't even have 1/3 of the total fasteners in and it is solid as a rock......
Yep, let me see if I can get some more pic.s later today....

That was quick!

Ha, ha....that would be the power of the 20 something generation....honestly, both of these guys have worked for me a long time. Dalton worked on his first car with me about 17 years ago...wow, 17 years ago....where the hell does time go?

Okay, some angles on closeups..... and I still can't figure out why these pic.s go on here wonky....trust me, just tap on them and they will be "normal."

Dumb question but Will there be an an access door for spare tire and battery in the bed floor or will you be relocating them?

Pop rivets? Wouldn't spot or plug welds be better, especially in the long term?

Rivets have a nasty habit of working loose when there's any kind of repeated flex happening.

Nope, easy access to the spare and battery through the bed panels. Spare slips right out, no problem. Well, rivets are still holding kits I saw put together 35 year ago here so I feel pretty good about them. Factory Five Racing has always used them in their kits and I've seen some of those cars routinely lick the 200 mph mark. Maybe our rivets are a little different from yours?......

I don't have a Problem with Structural rivets and I believe what you are using are a Hi grade Steel structure rivets. I would prefer using a structural adhesive with the rivets if not all out welding myself.

There are many many different types of rivets many stronger than actual welding.
Even some of the new Structural adhesives are just as strong as welding.

Dennis, well, oddly enough, you also do use some structural bonding resins on this as well as the rivets. On my roof bond I'll be using some flush rivets and epoxy with ceramic microballons added to it. In fact I'm going back and reviewing some of the videos on the older Jetta builds to see just where more of those adhesives are used.