ORIGINAL: Jerseyboy
I also drilled an extra hole in the conrod for better lubrication.
De Smak whats you take on this wear?
OK, I think the extra hole is a problem, it will alter the rotational weight and thus the characteristics of the lubrication circuit, 2 holes I fear will not allow the pressure to force the oil to the bearing faces, causing the excessive wear, so I also wonder how much wear there is to the small end and wrist pin and I wonder if you deburred the big end bush correctly. I see the huge scoring on the back plate and that is down to the rod wear.
In conclusion I feel that the early death of this mill is your own fault from being overcautios and not knowing the conciquences of your actions. So I don't feel this is a manifacturing fault but wholely owner related.