Can't stand propane for cutting. Unless you're cutting 2" thick plus where it is better than acetylene.
It's a sod to light on a windy day, takes 3 times as long to set your flame, wider kerf, more heat into the plate, slower cutting speed. You use a lot more oxygen too.
Pre heating or burning its the way to go 100%. As said you get tonnes more BTU and its cheap.
