Thanks for your response!
Which hole did you use to fill carts with ink?
Fill hole, not air vent
Did you remove the air vent hole plug before installing carts into your printer?
I did remove them when first filling, but I had assumed based on the way I read the instruction sheet that they had to be replaced before installation. I tried a print, noticed right away that something wasn't quite right (ie barely any ink being deposited), then stopped it and removed the air vent plugs. Do you think this could have damaged the carts?
Is the fill hole plug in all cartridges?
Yes, they all seemed secure when I refilled them.
Have you cleaned your printer's capping station, wiper blade and/or bottom of the print head?
Yes, multiple times. It was cleaned by your instructions before switching over (in fact, that youtube video is how I found you guys), and again a couple times over this whole process. It seems to be filling quite quickly with your carts, so I think you're right - something's probably dripping.
As for the black cart's chip - yes, the plastic piece that holds the chip isn't secured to the cartridge.