Is their two trenches cut in the case where the crank sits? The trench would be right under where the rod would be in the center of each hole. 4mils don't have to be trenched so I wonder if the other owner was blowing smoke up your ass. Post another pic of the cases closer or pic a larger pic,
Appears that your machining skills are better than your spelling, punctuation, and sentence structure skills.
Atta boy, you're still going to die on this pile.