Before buying new tires, I needed to fix my Pantera's negative rear camber that caused the inner edge of my 335-35/17 tires to wear. So, I went with the BOSSWRENCH solution. Hall didn't have any adjustable camber bars in stock and no ETA. So, I built my own adjustable camber bar out of thick-wall, square tubing (weight not an issue for me). It took a few miles and a number of ½-turn adjustments to get rid of all the negative camber, but the new tires are wearing nice and even.
First photo below shows the camber bar after installation before I started making the adjustments. Second photo shows how much adjustment was needed to eliminate the negative camber.