So I'm going with the Vac 700 as my next pen, to be used for lecture notes due to its high ink capacity. It has me thinking, though, how do I fill this thing when my bottle of ink itself is low? For other pens I would just take off the converter and inject the last little bit of ink via syringe directly into the converter, but how would I do that for a vac filler, since it needs to maintain seals and all of that. And, yes, I'm one of those guys that wants to get every last drop he possibly can of ink before throwing the bottle out. My father taught me never to waste anything.