First pop off the back cap gently....
There is a barrier between the dead space and where the ink supply was... I took a drill just a bit smaller than the inside diameter of the barrel and drilled out the barrier... you can actually do this hand holding the drill bit since the barrier is thin.
I used a bulb syringe to flush out any remaining ink.
I then fillled the barrel with water to test it.... this is where I found out that if you are not careful it can get real messy.... because the barrel is not airtight at this point... the water started to drip slowly out of the nib/feed. At least I found this out without using ink...
You need to use a long nose plastic pipette to fill the barrel... you want to get past the section you drilled and fill from the bottom up... for some reason if you try to just drop ink from the back end, you end up with an air lock at the area you drilled and you don't get a good fill.
You also want to wrap the nib area with a napkin/paper towel to catch any drips.
Fill the barrel and quickly pop the bottom cap back in place....
The pen wrote beautifully after that...
I placed the pen nib up in a cup with paper towel on the bottom to test for leaks and left it there for a week...no leaks...
As I said, this can be a messy undertaking, but you get a fantastic amount of ink in the pen and don't have to disturb the nib/feed assembly.
Someone, said it could not be done when I first read it... but being the thick headed Irishman I am, I decided to see for myself.
Well, I'm joining in on this conversation a little late, but I've been away from FPN.
I have a Pilot Varsity and it was completely out of ink when I got it. I was able to remove the one piece nib/feed assembly by force majeure and I cleaned out the barrel.
So I'm wondering what ink to try with it. I'm also wondering how many times I can remove and replace the nib/feed assembly before the plastic deforms and lets ink leak around the feed.
It looks like it could be a useful pen. I have to figure out what ink mixture I'm willing to risk in it and how much. I don't know if I should take a plunge and fill it to its limit with ink the first time, on the theory that I'll get a finite number of refills before it fails and I should maximize its use, or if I should put in only a small amount of ink in case the thing doesn't work in the first place?
Oh, the travails of salvaged, cheap pens and the inks that love them!
Soon to be a major motion picture.