Littlejohn- Talk to me about making a cell punch tool. I had some 1/2 tube cut but it looks a little too big... id of .5in. What have you found to be the ideal id of punch and recommend end punch part to use ie copper ferrule etc? What about the length of the punch tube itself. I see Cushman's page says 25mm close to 1 inch.
Any other tips on mounting punches on a bar ie. nicot cups, jzbz cups etc?