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If he considers a 12 point 12 mm socket a "special tool" then yes. I find them to be quite a common item though. Just mark it so you can put it back in in the same orientation to the rear flange or you will get a bad vibration.
I don't get this mark it. I have never marked it and never had any vibration even at 80 mph. Check my specs too, 80 mph is scary shit.
I never even marked it when I had to separate the slip joint on my 2 piece. Just made sure the u joints were in sync.