Had similar problems with a brand new MP 4" steel crank a few years ago. It was .0005" too large AND .0005" out of round,,,,turned mains .011" to get true and oil clearance. It has been run for over 10 years now with no problems. Seems a shame to have to work on a new crank...especially AFTER all had been balanced. They offered to replace it,,but,,it had been balanced and I decided to keep it and repair it.