I used a canvas tool pouch I got at Lowes. I mounted it to the back of the seat. I used large flat washers inside the pouch and took the back seat cushion loose to add flat washers and nut to the inside to share the weight. Works and looks great.
Had to take the pics. Looks like I used a piece of flat metal too. If you loosen the seat back cushion you can get a flat washer and nut on the inside.
