Cooperino, when I rebuilt my original ones I did it by filling the ends off rather than turn them. I only have a modified wood lathe, not a metal lathe. When I welded the ends back on I used my mig welder, and then filed the ends back down a little in my vice with the tip pointing down, and filling down, so I didn't get any metal in the valves. I thought I did everything right, but still had a leak. I bought new ones not rebuilt ones so I didn't have the same issue.... or so I thought.
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