I measured the space above my 5lb tank, there is less than an inch to spare, so it is the largest tank that wills tand up on the hump.
Originally Posted by macabra11
Is it OK to have the CO2 NOT upright? Will that cause problems for the system?
You need it upright enough that the liquid is not being drawn out, so do not put it on it's side unless you have an Anti-Suphon tube. You should be able to angle it 30-40degrees from verticle without drawing any fluid.
Anti-syphon tubes must be custom installed for your tank, the tube must always face an upward direction to draw gas only and function optimally. If you are concidering this, call a local paintball shop and ask if they can install it for you. (They usually only work with 9oz-20oz tanks.
You might be able to get away with putting the tank on the floor of the chest freezer between your 4 kegs (not sure how much room will be leftover) and connect a high pressure line to the regulators.
I only have the 5lb tank, but I am pretty sure I could fit mine down there, if i pushed the 4 kegs to the outside corners.
a Paintball remote line fits my tank and regulator.