Here's how to make a pen mod assembly. The refills are inserted without being flipped. Turning the pen may cause the Signo chip or Signo broad cap to fly off, so if you're concerned, please glue them. The following is a template for listing modified pens: These pens were made or purchased over 10 years ago, so I cannot guarantee the spinning feel, build quality, usability, or condition (scratches, dirt, etc.). I will do my best to indicate the availability of replacement parts, but there may be discrepancies in my memory. Please understand the above before purchasing.