[InFlight]

I generally prefer riveted construction when practicable for frames. Otherwise bolted fasteners. Even with experienced teams, you'll have much more consistent build quality that way.

We did weld some steel bumper attachments this year. We've used some welded structure in the past as well. Welding is a useful capability, but it takes a lot of practice to make good welds.

There are some situations such as a swerve drive pivot tube that welding or brazing simplifies the construction details.

I've brazed repaired aluminum automotive parts. It similar to brazing copper plumbing, it's much easier skill to learn then good TIG welding.