Had a friend offer me a Parker tandem axle trailer in need of some TLC, mostly in replacing the wood deck. My research says the tandem axle should be a 6000lb rating. Is that in the realm of reality? Would that be a good option for hauling a 3000lb tractor? Also, has anyone used metal grate in lieu of wood planks for the bed? My small trailer has an aluminum deck instead of the plywood that it is designed for and I really like the results.