I bought my tanks a long time ago and would not use anything else.(oxy-acet) Propane dose not burn as hot and I'm not sure you can burn steel with it For stuck bolts propane just dosen't get it... I think you will be disapointed with anything else but O/A... Home Depot here is where I get my tanks exchanged. Just get a small set to start you can always sell it and go bigger. I can't even imagin a fab shop with out them.