You must have had the same problem I did! I had been noticing some strange tire wear for awhile--they looked like something off a lowered VW.
After a few quick measurements, I discovered I had some camber and toe-in issues--the left side being much worse than the right. I found a place to have it straightened, but not long after, it started doing the same thing.
My Moser 12 bolt has .250" wall tubes (the site says they use .188"?) that don't seem to have any problems so far, even without any additional bracing.