I originally planned on using the 16 oz. tank, but since I have both size tanks and there is so much room up front, I think I am going to set it up for both tanks. As I stated earlier the 24 oz. tank will have to berotated 90 degrees in orderto make it removable and eliminate any carving upof the fuselage structure. If for any reason the 24 oz tank does not function satisfactorilly I can opt for the 16 oz. tank. No harm, no foul.