I am so happy you posted this video. I have been having bad vibes for 3 years ever since I purchased from that shop in Henderson. I am on my third front drive shaft as well and they have sent me multiple videos, emails, stating everything is fine telling me in the videos on the lathe that it's perfect. Customer service has been great and are quick to "warranty" my shaft, but I remember reading a comment on here a long time ago "the best customer service is the one you never have to use." I always believed them and thought the vibration was something else and I have done EVERYTHING in this 3 year span. Rebuilt my dynatrac ball joints, torque check, multiple tire balances, trying friends wheels and tires, had the rear diff rebuilt (didn't know my breather tube extension pulled apart and sucked in a bunch of water), two alignments from two different shops, new unit bearings, new axle shafts front and rear with new bearings/ujoints, front uppers to really dial in the caster, paid a "driveline specialty" offroad shop for a diagnosis and they tried to sell me some chinese adjustable rear upper arms, went back to evo to check the rear diff again, stuck a gopro to the bottom of the jeep, pulled the skid plates off, checked motor mounts, trans mounts, was considering a new t-case until I watched this video. Went to the local drive line shop in mission viejo CA and both my "perfect" drive lines needed to be straightened, and the rear needed another weight. They offered to help dial in the caster as well. And the best part was I went to pick up the drive lines and the labor was completely free!!! Also, I asked how much new drivelines were and like you stated eddie, I got a cheaper quote. Thank you again...