Harry, > The point is I made a personal decision > about what I will have - I want milled square crankpin ends for the return > cranks. I'm with you here. One the great attractions of this hobby is that we can do the job how we ourselves want to do it. O.K. we can seek advice but when the metal gets worked it's entirely our own work. I say this having spent a considerable amount of my working life (in engineering) supervising development work, writing reports, making presentations to justify some procedure or other only to have some member of the hierarchy dismiss my carefully thought out conclusions on a whim and substitute his own procedure based on another whim. But, since retirement 12 years ago - no more! Now I do it my way, if it works, great, if it doesn't I have only myself to blame. Life's a lot simpler this way. Regards, Barrie MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.