All of our .061 RC combat planes used 2 oz tanks and when the tanks ran dry it didn't seem like the round of dog fighting lasted long enough. 2 oz seemed like the practical limit for tuning a .049 - .061 to burn the entire tank.
I've never used steam to form wood and have thought about giving it a try sometime.
There was an old time modeler in this area who specialized in building WWI planes of this general scale that were so realistic. I'm wondering now if he used steamed veneer for his projects.