How hard and complicated is it to turn a rough green wood of say "20 in diameter for out board turning??? I just got off phone with a turner who said that was a much bigger deal than advertised, he said because it is out of round, that lathe would likely walk accross room? I realize you would have to pay about $300 for stand alone tool rest. What other issues or concerns are that that I may not be aware of? Will 1 1/2hp be enough to outboard turn 20" bowl?