Here's what I spent my day doing, as a result of being salty about my Ackerman pump pen not arriving and getting no responses to my multiple queries to customer service. And really, it was so stupid-easy, I should have just done this to begin with.
Annnnnd here's a general run-down on how I did it:
Close-up of the tape overfeed on the nib:
Hopefully other tinkerers and those who desire, specifically (like me), to use G nibs in their pens, will find this helpful and interesting. I know I'm enjoying it! The only problem I've come across is that you CANNOT give the pen a little downward shake to prime the nib. It will spew a big ol' droplet or two. The way I would describe how to get the nib tip primed, should it run dry, is to do little "woodpecker taps" on a piece of scrap paper. Or if you're really careful (*cough*adventurous*cough*), light taps where you're going to start your line. This should be familiar to others who have put dip nibs in fountain pens before.