Having received very helpful comments here in trying to select zero turn for mowing my large estate which has many steep slopes I have come to the conclusion that no ztr will do what I need. I have since been looking at the JD1545 and New Holland M35/G6035 4wd front deck mowers. My questions are one does any one know how much the deck will swivel up and down during mowing to accommodate sharp slopes. My steepest slope is about 30 degrees (measured) and comes off the side of a drive cut into a hillside so it drops off quickly. My JD 955 with belly mower will handle this but will tear up the sod sometimes if I don't lift the deck. Second any strong opinions on JD versus New Holland.