HMMM, I have a older but nice Fuji 7spd Beach Cruiser frame that has broken at the drive side DO, I thought the rear wheel hub bearings were shot when I got it cause you could feel the wobble without riding it. Upon tear down I found that where the DO fits in the chain stay Slot the front didn't get brazed very good and popped but the backside was brazed good but caused the chain stay to snap. Looking at the bike you would never have seen it all looked good. I saved the frame and parts and was hoping a good friend who is a master with a torch could braze it back together for me. Last spring I picked up a new Mig setup with a spool gun and a plasma cutter, I set the mig up flux core but have since got a bottle for it. I haven't even tried the mig out yet only the plasma cutter but I wonder if I should give it a try After I learn the machine, if it works great if not it's not a big loss.
Glenn