I plan to overseed my yard this September by renting a slit seeder. I am choosing a slit seeder because I have a areas where I plan to spray roundup in an attempt to get rid of (or at least reduce) the bermuda that is invading my fescue. My question is - will two perpendicular passes of the slit seeder provide enough coverage of an entirely dead area of turf? I don't want to have rows. Also, I have read to make one pass, then another pass diagonal to the first, at about a 45-degree angle. Which is recommended? The slit seeder is not a machine I've used before. Anyone out there with slit seeding experience that can let me know if this sounds okay?