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Each set-up and operation becomes more and more tense as you put more and more work into the crankcase. Measure twice, cut once, goes out the door, you measure a million times before committing to the next cut.Mike
The only thing worse than making an outright mistake, is to misread your own drawings. Been there, done that. You have my heartfelt sympathy. I know you will carry on and redo whatever is wrong, but sometimes life just sucks!!!