I upgraded years ago, I broke studs on the starting line and the wheel/tire came off resulting in a bent quarter panel. The studs were only a few years old. Since I have Mark Williams axles I sent them to them and had 5/8 studs installed and they have been fine ever since, I also check the torque quite frequently. On my way to Carlisle last year I broke three studs on my H.Q.C. luckily I caught it and a fellow racer works at a 4WD shop near the route I was taking was able to fix it,but I had to leave the truck and buy a new wheel. The night before I decided to check my air pressure when I did the tire valve fell apart I got it fixed and put the wheel/tire back on in the rain, I swear I tightened up all the lugs with my impact apparently I didn`t and I should have checked again before I left.