I had some 1/2" 14 gage square tubing in the scrap metal stack and some 1" 11 gage flat stock. I got out the MM140 and chopsaw and got to work. This is what I came up with. It has enough room to strap down 3 12 packs of beer for the trip home, without stacking them. It's strong enough to carry more if I stack it and tie down well. I can carry an extra gas can and cooler for longer off-road trips, or on-road for that matter. The bag behind the seat is just right for carrying the tie-down straps.
This should help save me some gas money going to work and back, and if I need a few smaller items from town without having to take the truck to get them. The bike only uses about a gallon of gas round trip to work, and my truck uses more than 3 for the same trip. It's an XR 650 L, so it has plenty enough power to keep up with traffic on the highway