-
not the highest quality
Weldtite is what you'd get if you went to your LBS. The quality is the lowest an honest person can get away with. At least they are going to be hard and tough, unlike some anonymous Chinesium ones, but the huge diameter and roundness tolerance on Grade 1000 leads to uneven pressure and accelerated race wear. Given how cheap even Grade 10 balls are in the context of a single home build, it seems like a false economy.
@gbj_tester Got a selection off eBay - not the highest quality but at least I'll have spares!