No shit... If you are going to call yourself a welder (of any type), the ONLY thing that really matters is whether or not YOU can be sure that your setup and technique will deliver 100% penetration on every joint, every time...without X-rays, laser cutters, dilithium crystal dye testing or whatever the fuck. If you are going to weld anything that is going out on the road, esp. for a customer, you'd better BE sure of that. And don't grind the whole weld out trying to make the shit smooth! DAMN!