Please help me -Welder Controller

Its been a little bit sense I have looked at comments , what to say thank you wow what a help I am learning and I would give a million to go back in time and change a decision I made, in collage we started with a.c. and dc electrical theory and I was bored out of my mind ELECTRONS, PROTONS, ALUMUNUM THIS AND COPPER THAT, OL MY GOD I WISH I COUKD GO BACK 25 YEARS I WANT TO KNOW THST NOW SO BAD I COUKD SCREAM, bidding jobs , wiring house and hospitals has made me a good living but electronics are so fun!!!!