Med601,

I was able to stuff a 20 oz. Dubro tank in mine which gives me a full 10 mins. with a Saito 270. That same tank would give me 12 mins. on an OS 160 I used to have.

I really don't know why mine is so heavy. A Brison 2.4 is only about 1 lb. heavier that an OS 160 and a Saito 120 but my weight comes out over 3 lbs. more than you guys []