Yeah, I really like the 500 too Greg, a very well balanced loader... I'd never go back to the wdc... even it were a freebie!
It'd take alot plywood Neil.
It'll dry soon enough. Roof asphalt shingles work pretty good for "matts" over soft, muddy ground.
Yes, a gru/motor at each wheel, the same as the adt in previous pics. I don't know the final rpm, but tonnes of torque though! I don't have a scale to weigh it, I'd guess it to be somewhere around 13-15lbs... it could do with more weight. I was eyeballing the tires from the 740 to put on there, hollow tires full of BB's.