I learned how to make these on this forum, I think they look great. I bought a bike with buckhorns, and got the oem drag bars on ebay. I made these from 2 3/8 x 6" hex bolts, vinyl lock nuts, washers, and Husky 19mm 3/8 deep sockets. These sockets are 2.5" tall, just right.
I've seen some disagreement about what rise is needed so dragbars don't hit the tank. If the drag bars are installed angled up they might not hit the tank with no risers. But these are installed with the angle bent straight back, and clear the tank with the 2.5" sockets.
Only hard part was I had to drill out the hole in the sockets for the 3/8" bolt to pass through. And it was hard metal to drill.