I have a small portable oxy-acetylene setup, but sometimes this setup is too small cut large amounts of material or heat/bend solid bar stock. I called my gas supplier to find out about getting bigger tanks, and he was encouraging me to consider MAPP as an alternative. He said the only advantage acetylene had was for brazing. What are the pros and cons? I pretty much only use the oxy-acetylene setup for cutting and heating....not welding or brazing. I usually hear about people using acetylene, so is there disadvantage in using MAPP? Maybe MAPP is newer, and acetylene is old school. Is there a cost issue?