I'm with Grigg, have always had a free-air acetylene torch, when the tank needs filling just switch it with the tank on the oxy-acetylene cart

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics