Today, a client gave me a Pilot Capless he doesn't want anymore (after less than one month !!!!! ) because he doesn't like the fine nib !! ??? When I opened it to see how the cartridge was empty (but it is not at all) I saw that ink leaked in it ... Exactly as do my Grey one that I use with the converter provided with the pen. I thought it was because of the ink I use but it's the same problem with the Pilot cartridges ... So my 2 Pilot are leaking the same way ... I've cleaned it, but after having written a little bit, the problem is back ... Has anyone an idea ?