Though the Zebra G in the Jinhao can be made to work, the shortcomings mentioned in the comments and the article are real. It is difficult, and is, at best a "workaround". Imerse them in boiling water for one full minute . Then take them out to cool down to room temperature. If you leave the pen overnight, ink might dry up. Just push out some ink from the convertor to get the ink into the feed and you can use the pen again. And if your nib somehow runs dry, use the same steps.

I've tried Noodler's ink. I think the water tension is not strong enough and when the nib is flexing, it's more prone to railroading. The Platinum Carbon Ink seems to be more viscous, and it's also waterproof. I did not share your fortunate experience inserting the Zebra G nib into the the Jinhao 750 ! As the curvature of Zebra nib sideway with your thumb and index fingerdoes not fit that of the feed , there is always a gap near the tip of the nib when it is fully inserted . You end up with a useless pen as no ink will travel to the tip with such gap !I've tried a few positions of alignment and I found the one above with the most effective ink flow.

Is easy to remove, reinsert, adjust and clean with a precise, smooth press fit with a hard stop. It's taken me years to get here, but it is about as fool-proof as you can get. After you completed all the steps, your new G nib fountain pen will look awesome. Time to fill up some ink and test.When you draw too fast and flex at the same time, it has a tendency to railroad. Flexing uses a lot of ink and the feed wasn't able to provide enough ink. So go slow when you're drawing. Do you use a nib pen for drawing, making comics, calligraphy? Do you find it a hassle to have to constantly reload the nib? Ever wish that you could use a Zebra Comic G Nib on a fountain pen? If you grip wrongly with the pliers, you're going to damage the plastic nib. I've damaged mine after I found out the correct way of gripping. Don't be like me. Lay the feed on the sandpaper, then hold the feed with yor thumb and index finger and scrape its side lightly on the sandpaper in one direction ( i.e. either towards you or away from you ) . After a few strokes, switch to the other side of the feed and scrape it on the sand paper .

Look out for the first cut on the feed, the first slot of those vertical parallel thingys. You should align that slot to the cut of the nib such that when you look at the nib from the top, you can see through. Please have a look at http://www.desideratapens.com/faq for more information. And feel free to look at my user manual at the bottom of the navigation bar.Spend some time to look at the feed. Note that the feed is not circular all around. There's a flat portion at the bottom. Look at the grip section and look for the flat part there. You'll need this to remove the G nibs from the pen. Because the G nib is not designed for this fountain pen, it will be a bit tight when you it in together with the feed. How to put the G nib on the fountain pen With a normal nib holder, I could only fill half of the (top left) square with lines before I need to reload. Other than the top left square, all the rest were drawn with the G nib fountain pen.