I have found that restoring vintage cars is not as easy as expected. This part is well made and will probably fit most vintage bikes, but for the old Columbia bike I'm restoring I had to make some modifications to the part and frame. The Columbia's BB cup is a few millimeters smaller, so no matter how hard I pounded on the part, it wouldn't go in. I had to file and use a belt sander to reduce the circumference to an acceptable size. The Columbia shell also had a burr on the inside of about 10mm that prevented the part from being fully inserted. I had to file and sand the part to remove this obstruction. Another thing, there was a piece of tubing inside the case that was preventing the screws from aligning properly, I had to drill through to align everything. Anyway, after working on this all day, it looks really good and will save me a few ounces of weight. Happy to get rid of the extra heavy one-piece crank from the original bike.
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