Hope this is the right place for this question, I've almost finished building an altered chassis, 120 inch mild steel to SFI 7.50, I used 3.2 mm seamless tube throughout and xxxx it's heavy! So I'm wondering as it's only tacked together from the motor plate forward should I change the tube to 2.4 mm wall thickness from the motor plate forward and loose a bit of weight from there? Thanks in advance.