I’m using a black 0.7 mm Jetstream refill with the Esterbrook adapter in this FJ pen, and it works like a champ. The fit is perfect, almost as if it is the original setup. That’s kind of the point, right? The original pen, with a modern writing experience.
Using Shapeways, or other 3-D printing services, has become a great way for us to get old pens back in action, or make changes to modern pens - like adding clips - to better fit our respective styles. The growth and popularity of services like these can only benefit us all.
Maybe I need to 3-D print one of my old favorite pens, The Pilot Explorer, and get it back into the market.
My thanks to John for entrusting me with his creation. I may just need to buy this one off of him.