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Now for some guidance. I went to work on the cylinder. I got to the point of drilling the bore for the piston. Looking at the print, it shows a flat bottom. Is this important? I know that the cylinder shape and volume can matter on more complex designs. I had planed on simply drilling the cylinder, as I don't currently have a 3/8" reamer. I could take a spare 3/8" drill bit and repoint it to a flat profile to finish the bottom. But is it necessary?dalee