I'm thinking about trying out some of the new rear discharge mowers that are on the market now. My hesitation is that when we tried them a long time ago, they left lines of cut grass behind. Is this still a problem? Also, I've gotten to a point now that I have to put mulching kits on all of our mowers because the guys won't use the open side discharge machines for fear of flying debris breaking a window. Would rear discharge machines be the better solution?