This is the second one of these I've made. My wife's XT-250 was first, added to her Borrego Rack for our recent trip to Death Valley. Crudely manufactured from T601 Aluminum angle stock, it attaches to the Borrego with rubber-coated metal strap clamps from the electrical section, it's hell-for-stout, and REMOVEABLE from the Borrego without leaving any hickies.
I already have a RotoPax 1 gal set-up mounted to the front of the Borrego, and can add a second 1 gal (which I did for DV) using their extension piece.
I keep a vintage one-off Marsee bag (I used to work there...) mounted to the Borrego at all times, so now I have added about 80 square inches of additional cargo "shelf" with 10 tie down points drilled into it for bungees, etc.
Worked so well I refined the design a bit, and here it is:
After powder-coat, before fitting diamond-plate "floor".
Raw stock I used sitting next to...for comparison.
Final fitting before powdercoat
Finished, with my RotoPax set-up, and Marsee bag.
Fits my needs to a "T".
My first one mounted to the Missus' XT 250 in DV. Wd did nearly 900 miles with that little bike and rack loaded down with no issues.