My max 2 has grade 5 bolts connecting the sprockets to the axles. Is this sufficient ? The hustler i rebuilt in 02 had case hardend bolts, #50 drive chain, with #625 drive chain { which is a hardend #50 chain}coming off the transmission to the center axles. I guess what i am trying to say is do you think grade 5 bolts and #40 chain {at the corner axles} is sufficient. Any input would be greatly appreciated.Ps i plan on running 10" wheels and swampers or k 472s.