Sorry if this has been answered elsewhere, but I'm having trouble finding a definitive answer. I'm going to be putting together a new regulator and would like to know what the output delivery rating should be. I see folks that use 60psi, 100psi, and 200psi - mostly by browsing the FS items in trading post by the folks that I would consider the gurus. Is there a max and a min value that we should keep in mind when buying a regulator?