Nice Job!! I am currently doing pretty much the same as far as the rails and side extension. I think I ended up with about 41 inch rip to the right. I picked up full length rear 1-1/4 X 3/16 angle, front 2-1/2 x 3/16 angle and 2 inch X 1/8 square stock. My side extension is 20 inches wide. I still need to paint the rails. I think I'll use some brush on expoxy.