I've been reading up on Remingtons since I was fortunate enough to find my Pietta last week. I understand that one common modification done is to create grooves for lubrication on the spindle the cylinder revolves on. I'm reluctant to start filing on mine and certainly don't want to "cut" more than needed. I wonder about using a thread cutting die, one bigger than the actual size that normally fits, so to cut shallow, undersize (or would they be oversize) threads? I would prefer whatever I do to at least look like it might have been "factory", or at least done by someone who knew what they were doing. What do you think? Is it even necessary, since the Pietta has a flat bottom on the round spindle?
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