The RSVP V1 is a simple pen mod created by Kam.
- Pentel RSVP
- X-acto knife or some other tool for poking the back cap
- Sandpaper or a lighter
- Take the RSVP, remove the cap, back plug, and ink tube.
- Remove the clip on the cap and use sandpaper/lighter to round off the stub.
- Reverse the ink tube.
- Mark the COP on the ink tube.
- RSVP V1 tutorial & photos @ Pentrix.com