So the screw hole is so small I need a syringe to take advantage of it? If I just want to slide the tank up a bit in fill through the top should I get it w/o the screw hole or do you not recommend this?
You can order it without the screw. I prefer it without but I have both. Yes you fill with a syringe. I use a syringe that's for filling computer ink. The needle is blunt end and about 5 in. long.

Less hassle without the hole. Another bad thing about the screw is if it's too tight against the carto , it deforms the tank and leaks.
I love the tank though because the ends are so thin. Some tanks like the MAP have ends that take up 30% to 50% of the tank size.
I wish Iken made a short tank because I like the chrome ends on his. I'm thinking about shortening one of his for my short Fusions.
UPDATE: My wishes are over. I just saw these on Twitter and it said they're coming soon. These are going to be SAWEEET"