Hello list! I have recently purchased a Mutoh ip-530. Unfortunately, I haven't gotten any reply from the one source in the US that supposedly sells the pens. I was really hoping to get my hands on some of the auto-advancing pencils. If anybody has any of these that they would be will to sell, I would be very interested. Has anyone on this list been able to find supplies for their ip-series Mutoh? Anyway, I'm not really interested in making precision plots for drafting. What I do is more like conceptual art. I want to build my own pen-cartidges to deliver various media, including ink and graphite, onto the page. To do this, I need to know the required dimensions of the standard pens. I am hoping to find somebody on this list who has one of these who would make some measurements of the pen with a caliper and pass them on to me? Also, if anyone has any old, dried up pens that you would otherwise throw away, I'd sure like to have them. Thank you in advance for any help or advise you may have to offer! Regards, Andrew Sinning Minneapolis, MN