"Can't we just all get along" Agreed on the last point. I think that you all have a point. In my case, in which a part is being reproduced, I hope that we can all agree that attention to dimension, metallurgy and process are sufficient to produce an equivalent part. By the way, the final (I hope) prototype has just been machined. I'll have the parts in my hands next week and will begin my QA. Thanks for all of the input.