What are your thoughts on the nib size? Mine writes very fine and I'd have to say it is closer to Oriental Fine then a European fine. The cap seals most excellently it always writes for me even after several weeks non use.A little follow up- So I bought the kit and made the pen and I think that this pen may now be my everyday pen. I was concerned about not being able to get the nib out in case it needed fine tuning but it worked as soon as I put in the ink cartridge. It writes very well. I recommend getting this kit.