Ok, so my rcv 1 piece prop shaft should be here today! I have a couple of questions. My 2017 xp1000 already has a nice steel drive shaft tunnel. The new shaft comes with a metal loop just in case the shaft fails. should I keep the tunnel or use their loop? also rcv suggested I get a new roll pin to keep it tight. I know on my old 800 I used a bolt. Is anyone else using a bolt through the front diff? If so, size/ grade?