The trick to 1/2 studs is proper torque (100lbs) and a wheel that has enough surface area to contact the entire rotor/drum. Ran 750 passes with 1/2" studs in the high 1.2- low 1.3 60ft. Front planet carier looked bad at around 325 passes so it was swapped. The 2nd one went 400 passes when it stripped. The driveshaft is aluminum. The yokes are forged, not billet. 1350 solid Spicer u joints. The only drive train parts besides the planet it's broke are the rear wheels and 3 sets of Dana gears. It now has 5/8" studs and a steel front planet, stock trans shafts (850 passes)
Doug