Hey Guys, we are getting more and more heavy scrap and need some advise on setting up torches to cut 5 to 7 inch material. We are using oxy propane and I really need to change to liquid oxygen and just need advise on preasures and tips for 4ft scrap torches. We have been cutting lots of cars, tanks, angle plate and autos but this oil field scrap is a different animal. Thanks Marty