"I use fairly small tanks, don’t recall the size, acetylene is about 2 1/2 feet tall oxy about 3 feet tall. They are good for about 2 frames."
I use the same size tanks and have just completed a 3rd frame without recharging the tanks. Still have 400psi on both tanks respectively. This last frame I started with 450psi in the Acetylene tank. I have also repaired 3 frames with bad drop outs and cut down a basket ball hoop stand next to the driveway on the same charge. Unless I am doing something out of the ordinary, one should get more than 2 or 3 frames from this size tank and a full charge.