patch panel/tech ideas and help

well guys im ready to start welding in 1 of the panels that i had to cut out of the 73 and thought i would see if anybody had any good tech info ,tricks,or anything like that before i start....i'm not new to welding at all went to school for it and have been welding stuff here and there i do all the welding on my dump truck and did all of it on the duster moved perchs,installed muff,and odd and ends..but i have never did a panel or really anything this thin not worried but would like some pointers or at lease some tech for those that dont or can't weld may be able to use...my welder is a 220 volt 110amp mig that has the hook up for gas just never used it before ,also i have a big 220 volt stick ..so lets hear whats you tips and tricks...mike