RE: glowplug trouble
Seems unlikely, maybe the problem is not the bearing but metal chips left in the crankcase at the factory. In either case I think you should open up the back plate and see whats happening in there. I can't think of another reason for your glow plug troubles. An OS A3 or 8 glow plug should last a very long time in that engine on 10% fuel. I mean several years or more.
The good news is since your engine is new you can have it repaired under warranty.