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Hey everyone! I just bought a new Pilot Custom Heritage 92 demonstrator pen (from an eBay Japanese seller) and it arrived today. I went with the FM nib and really like it! Currently it's inked with Bungubox Sweet Love Pink However, I noticed what appears to be some cracks spreading from the center of the piston knob and wanted to ask if anyone else's looks like this - maybe it's part of the design? I did a Google image search but wasn't able to find a good shot of a CH 92 piston knob to definitively say whether this is normal or not. The pen is fine and operates perfectly, so it's not a big deal, but I do slightly worry that if it is a crack it may get worse over time. It's hard to capture the problem in pictures so apologies for the not-so-great photos. Thanks so much for your input!

Hello, wonderful community ... I've got ink- and silicon-grease stained fingers (all good), and a problem. Having reassembled my TWSBI Classic (making and correcting some of the usual errors outlined in Brian Goulet's life-saving video on disassembly / reassembly of the thing) ... I did a fairly creditable job ... but can't get the piston knob / endcap flush with the body of the pen. There's a little gap I can't seem to close - either by using the wrench, or titrating the threading. This gap is just a bit smaller than the thickness of the TWSBI wrench. The piston knob is 'locked tight' (turned clockwise to its resting point). No looseness there. The piston itself seemed to be in its optimal position before reinsertion: just a bit of wiggle space between it and its housing. The piston knob did come off several times, and I had to first seat it on the threaded housing, then reinsert the piston ...reseating it properly, for all I can tell. The ink capacity (using Brian's 'toothpick method') seems about right. A tad over half a toothpick. TWSBI reassembly seems a *very* fiddly operation....Anyone have a solution? I'm wondering whether this means (and it may) that the thing will also start leaking into the cap (another complaint I've heard about this fetching and affordable little pen). I'll also look at 'leaking into cap' posts to see if there's a solution there. Thanks in advance!

Quick question for those more familiar with the mechanics of these pens than I - does the cap coming off like this mean that the piston mechanism is necesssarily broken? Or possibly that someone turned the knob too hard and it now comes off but that the piston may still operate properly? Any ballpark estimate of how much a repair might cost? Pen appears in reasonably good shape overall so trying to determine if price of pen + possible repair is worthwhile.