Ok, so I am thinking through a couple of options for reattaching the leg sockets. Two have broken completely free from the bowl, the third is hanging on by one tab/weld.
Here's a closeup of one of the socket locations:
You can see the largest hole is nearly the diameter of one of the legs.
Option 1: Rotate the sockets by 60deg and drill holes for SS bolts/nuts.
Option 1b: See if I can find someone to re-weld the sockets after rotating 60 deg (More expensive).
Option 2: Use double SS washers to "sandwich" the bowl and bolt back in the original orientation.
Option 1 means that I still need to find a way to seal the holes rusted through the bowl at the original orientation. I've seen JBWeld and Quicksteel both mentioned in other threads. Some of the socket tabs still have a piece of bowl/weld attached that would have to be sawed or ground off.
Option 2 should eliminate the need for sealing the holes, but may not be as strong a fix depending on how weak the bowl is already.
Am I missing other options? Which would you use?