What they said!
This year at King of the Hammers I was talking to the owner of a fab shop that specializes in UTV's and he said they originally weren't rosette welding their radius rods, but the tubing actually began to mushroom at the weld, so they started. I also know at the Baja 1000 this year a top racer had one fail that wasn't rosette welded; ending his race. The rosette welds are a pain in the *** with a tig (for me), but hopefully I got good enough penetration on the bung.
This is just my family cruiser, but I've been on borrowed time with the factory rods as they have a few thousand miles on them. We're headed to Moab in a month, so I wanted to beef up the rear end before we hit the rocks with 4 adults and a kid in the RZR. I tend to build everything to race spec as my dad takes the RZR out a lot with his buddies and granddaughters and he isn't mechanically inclined in the case of a breakdown. Ideally, I would've gone aluminum (weight savings) or threaded a piece of chromoly, but I don't have access to a lathe right now. I maybe saved $150 building these myself, but I was able to use good heims.