That is why I love this board - Learn something new all the time.
Just one more question:
What was the difference in the "Dexta" 2000, and the 1973 model 2000 gas my neighbor has. It doesn't have 2 stage, but PTO doesn't push tractor either, and he has no external clutch on the PTO shaft. When clutch is depressed, tractor stops driving the bushhog, and the bushhog can spin without pushing the tractor forward.
Thanks for the info,