Vapn, I like the tube in your bottle. Makes it so you don't have to tilt your unit at all. Did you add that tube or was it a bottle that already had a tube. What size was the tube, looks like when i pull the nozzle off the bottle off, i could just push a piece of tube in from the backside?
That's exactly what I did. Took the dropper off and pushed the tubing in from the back side. It holds it there quite nicely. That piece of tubing came with another bottom feed box mod I have. Its probably some tubing you can get for RC fuel lines. It's 4mm OD, or 5/32" maybe.