I've acquired a cute little Salz Brothers Peter Pan, which is approximately two and a half inches long, capped. It needs a new sac - which is not surprising - but thus far I've been unable to get the section out in order to replace it. Doesn't budge at all. Here's some snaps: http://sudowned.com/filebox/pens/peterpan/1.JPG http://sudowned.com/filebox/pens/peterpan/2.jpg I haven't soaked it as that murders hard rubber sometimes. I may soak it gently - just the section and seam - and perhaps in ink, but what I really need to know is whether the section is threaded or friction-fit. At least if I know that, I won't be pulling it in an inherently dangerous way when I add (gentle, distant) heat to the mix.