Author: admin

Founder of Flexible Nib Factory LLC
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JoWo #6 and 743 replacement feeds now available

I am happy to announce that the following products are available for purchase:

  • JoWo #6 replacement feeds and housings in black ebonite (J6E) and red ebonite (J6ER).
  • Pilot 743 replacement feeds in two versions, 743E with 3 slit ink slot, for dry inks; 743EN with 2 slit ink slot for normal inks.

Since my online store is not yet operational, please use the Contact Us link to send us an email with the products that you’d like to purchase with your location and PayPal email address and we’ll send you a PayPal invoice. Shipping in USA is $3 by USPS with tracking, and $13 overseas. USPS Priority or UPS also available. Sales tax only if you’re in Texas.

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Bock #6 in clear cast acrylic

Bock #6 nib assembly in clear cast acrylic is complete.  This one has a steel Bexley nib.

I’m also reverse engineering a Bock #6 with a titanium nib borrowed from Newton Pens. The feed design is different because the nib has a different curvature than the steel Bock nib. The housing is also a little different, but it still fits existing pens that accept Bock #6 steel nibs.

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Bock #6 Prototypes

Each day, with the help of my son, I’m able to work about an or so.  We’ve made prototypes in acrylic of Bock #6 feeds and housings.  The housing is more or less complete; the feed still needs tweaking to fit Bock #6 nibs.

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JoWo #6 nib assembly in clear acrylic

I’m finally well enough to spend an hour or so a day in the factory, with help from my son to operate the Mazak QTU-200MSY live tooled lathe. These are production ready prototypes of JoWo #6 feed and housing in clear acrylic. I will tweak feeds and speeds to make the housing more transparent before offering these for sale. This one has a steel Goulet Pens nib in it.

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Current Standard and Custom Product Status

I have just put up a page for my custom feed services. Please see Custom Feed Fees for a complete list of pricing for custom feed manufacture. Enquire for volume discounts. I expect to restart custom feed making on November 15.

Standard replacement feeds in black and red ebonite, and in clear acrylic, will go on sale around the end of November. I’ve put up a price sheet.

I’ve gotten considerable feedback from my beta testers on the Pilot 743 replacement feed. I’ll begin selling these next month around November 15.

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Current Status

Here’s an update:

  • Ebonite replacement feeds/housings for JoWo #6 nibs are out to beta testers. Results are positive so far; I’ve made two improvements to the feed and housing based on tester feedback.
  • Ebonite replacement feeds for Pilot 743 FA (Falcon #15) nibs are out to beta testers.
  • Ebonite replacement feeds for Pilot 742 FA (Falcon #10) nibs will be shipped to beta testers about October 2.
  • I am looking at creating stores on eBay and Etsy. I have shipping sorted out now, thanks to needing to send feeds, etc. to my beta testers. Replacement feeds for Pilot 743 and 742 FA nibs will be first, followed by JoWo #6 and Pelikan.
  • I have completed my first custom feed design for a customer, and shipped the feeds.
  • I will restart custom feed designs shortly.
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Ebonite feed for Pilot Custom 743 ready for beta testers

I’ll be sending out some invitations to some of my Instagram followers tomorrow to participate in beta testing my new 743 FA ebonite feed.

Platinum Citrus Black ink in a Pilot 743 with FA nib and my new ebonite feed. Love the shading!

A post shared by Flexible Nib Factory LLC (@flexiblenibfactory) on

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Pilot 743 Feed in Design

This is a replacement ebonite feed for the excellent Pilot 743 pen, in particular, to support the full flexibility of the FA nib, shown below. This feed will become a standard product, along with the slightly smaller 742 feed, in black and red Nikko ebonite. I’m still tweaking the design, but it should be ready for beta testers by next week.