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 !
My solution is to ensure a good fit between the nib and the feed before attempting to insert it into the pen : I reduce the lateral thickness of the feed by sanding it down with a fine sand paper .
1) 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 .
2) Check how the nib and the feed fit together . Then continue the sanding process until you are satisfy that there is no gap between the nib and the feed.
It took me about 10 minutes to complete the job. Once this is done, inserting the nib into the pen is a cinch ! Just make sure there is no gap between the feed and the tip area of the nib . If you experience skipping or no ink flow when trying out the pen, it just means there still is a gap between the feed and the nip ! In this case, you can use the second trick to fix it as followed :
1) Remove the nib and the feed . Assemble them as if you are going to insert them into the pen
2) Use 2 small clips to hold the nib and the feed together (i.e. one clip near the tip area of the feed and the other near the end of the feed ).
3) Imerse them in boiling water for one full minute . Then take them out to cool down to room temperature.
Try the pen again and see. So far I have made 3 pens by this method and they all work very well.
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 !
My solution is to ensure a good fit between the nib and the feed before attempting to insert it into the pen : I reduce the lateral thickness of the feed by sanding it down with a fine sand paper .
1) 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 .
2) Check how the nib and the feed fit together . Then continue the sanding process until you are satisfy that there is no gap between the nib and the feed.
It took me about 10 minutes to complete the job. Once this is done, inserting the nib into the pen is a cinch ! Just make sure there is no gap between the feed and the tip area of the nib . If you experience skipping or no ink flow when trying out the pen, it just means there still is a gap between the feed and the nip ! In this case, you can use the second trick to fix it as followed :
1) Remove the nib and the feed . Assemble them as if you are going to insert them into the pen
2) Use 2 small clips to hold the nib and the feed together (i.e. one clip near the tip area of the feed and the other near the end of the feed ).
3) Imerse them in boiling water for one full minute . Then take them out to cool down to room temperature.
Try the pen again and see. So far I have made 3 pens by this method and they all work very well.