this is my first year (actually since mid august) in hte buisness. I have learned a lot from this site but I have yet another question I have not seen directly addressed. How much slope does it take to flip a ZTR mower? I have a ditch in front of a church that is very long. I have a 21" I have been mowing it with which adds about 35 min to mowing time. I just wonder if I am being too paranoid. How do you determaine if the slope is dangerous to mow? My z goes up and down it eaisly without slipping.