Hi, I am currently attempting to learn mig welding to restore two cars and have bought a second hand sip autoplus 130, i know you guys don't go much on sip welders but it was all i could afford. anyway the tip sticks out about 10mm from the shroud which i know isn't meant to be so i assume something isn't right. I was wondering if anyone knew if all sip parts were interchangeable or which parts i should buy? Cheers! Dave.