I"m new to the forum, and wanting to build a nice welding table with my Millermatic 200 . I"ve selected a 48 inch by 75 inch 1 1/8 inch thick top, with 5 inch I beam frame. wanting to know how far to set my I beams back from the edge for the best clamping and utilitization. This will be my first project with a MIG machine, .030 wire 75/25 gas. Thanks for your time and ideas.