Has anyone used a portable spot welder to do certain welds like the tank braces to the bottom trunk panel. Since I have the two piece floor, the spot welder could be used to do the braces without drilling holes. Reviews give this unit a good rating granted you make sure all the paint is off the area where the panel/brace would meet. Any thoughts on this? This unit is 120 v and sells for $170 with a 4 1/2 * Star rating.