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If we need to use a new cylinder, we put new rubber parts in them. The replaced rubbers are hopefully US made, boxes of them are sitting on the shelf.

I get what you are asking. ALL of the cylinders in the pics are machined....some are smooth, some have purpose made ridges machined into them. I have seen and used both types. As long as the surface is clean, the washer will seal as long as it is new. Used washers that were on a "grooved" finish...