Hi, Just bought a used fastmig, with too many options This machine is planned for use for only welding aluminium, mostly 5-6mm thick. The machine has many options I am not used to have, so some help on settings would be nice. Parameter: Pre gas time, can be set to 0,0 - 9,9 seconds. Post gas time, can be set to 0,1 - 32seconds, or auto. I would think auto is good? Creep Start Level, can be set to 10 - 170%. Start power, can be set to -9 - +9 ? Post Current Time, can be set to -9 - +9 ?