Thanks for your post. In all honesty, and according to my almost month-old experience of daily use, the #250 Bock nib unit and the BeaufortInk ink converter fit together so perfectly with each other and within the Kaigelu 316 pen, that I have not had any issues with ink leakage whatsoever. This is spite the fact that I use to daily carry my pen in my shirt or trouser pockets.
The advantage to the above modification is that it gives the pen owner the chance to experiment with other Bock nibs that can fit the #250 Bock housing, ranging in size from EF to 1.5mm Italics. It is neither difficult technically to do nor is it too expensive.
I hope this might prove useful to other pen enthusiasts willing to experiment with their awesome Kaigelu 316s. I welcome all input from other FPN members who wish to share their own experience with this modification, and who might potentially wish to try to take it even further.
PS: I have no affiliation to Kaigelu pens, Bock nibs or BeaufortInk, although I do acknowledge that Phil at BeaufortInk kindly provided assistance with picking the right components, after providing him, by email, with the right pen component measurements.
Edited by Frank66, 20 February 2016 - 14:24.