One thing the fj45 and fj40 had in common was breakable spindles. I managed to break the front drivers side spindle just a couple weeks ago and incredibly the wheel stayed on. I drove it around for about a week before I realized what had happened. Handling was terrible but the disc brake calipers and one ring clip held it together. So, I fixed it.
Then, I heard from my mom, that dad had broken a spindle during the fj45's first race. They'd actually brought a spare and Kenny replaced it by the side of the road. I don't know if I'm up for changing it in the dirt but we'll be packing a spare spindle for our race.