My last Patriot (Kit built w/Jett-50) had the 8 oz. but also has a 2 oz. hopper tank, I always set my timer at 7 or 8 min. (2yr old childs memory)and did not have any trouble- plenty for a nice flight!
I put my air tank in the bay between the servos and wing saddle, and also gooped it in and used a std servo to actuate the air switch, (Mini would be a great idea, as it gets tight back there)
FYI- Bob IS the man on this stuff but heres what I ran:
9x9 apc
K&B 1L
15% Powermaster fuel
Standard servos all around (148's and 3003's) on 6V [X(]
Awesome performance even though mine had split flaps and was kinda heavy-
