I have a Chargriller smokin pro with side fire box. I don't like the under carriage it came with. I want to build my own under carriage. Add some better wheels and better shelves on the side and front. So my question is, would 1.25"x1.25"x16 guage be heavy enough square tubing for the job? I will use angle iron for the shelves. I am just wondering what would be strong enough for the under carriage without going to over board.