If the Benjamin Tank is a 72 ci 3000 psi tank that will fill a Crosman Discovery 6 to 8 times......
Would anyone know hpw many times the Crossfire 68 ci 4500 psi tank would?

Would it be safe to say the 1500 more psi would say give me three or four fills ?
I don't know the resevoir capacity on the Disco so I cant use Air Hogs calculator.

The scuba option while not as expensive as carbon fibre air hog type tanks, is still looking like its gonna be:
tank with freash hydro 80 cu ft 3000 psi...........$139.99
K-valve for scuba tank.....................................$75.00
not sure what other kind of fittings I need.

So far thats 214.99 before tax and or shipping

I have been to all the websites and found at everyone, its looking like at least $300.00 plus to get set up. I'm hoping with the low operating psi the Disco has...that a small paintball tank with 4500 psi capacity..will get what I need done.
Just looking for a cheaper way to get about 10 fills a week

Thanks,
Ron

Doing the math, if I am correct, the 4500psi tank will give you 41% more actual volume. How many fills at a given pressure that means, I do not know

As to buying a paintball tank like you mentioned, go to that field and ask around! Kids spending their parents money love to buy the newest stuff, I bought a $300 4500 psi carbonfiber wrapped tank, practically new, for $60 last year. The kid bought a "better" one, or rather mom and dad did. Ask the field owner. If there is a speedball team there, you're almost guaranteed to get good deals! They get so much new stuff its unbelievable.

HTH,
Jerry

Thanks Jerry!
I need to call and find out about hose assm and any fittings I need to make it work.
I will stop by the paintball field I70paintball.com tomorrow and ask about used tanks.
As long as I can get 10 fills, that would do me for a week.

This is the tank I was talking about

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...;Category=36287