The biggest problem I see is it looks like the soil is dry as a bone. We all know seed needs moisture for it to germinate. We tell our customers if they don't water they will likely see poor results. We tell them they don't have to drench the lawn. Just keep the surface moist.
And what the heck are you doing with sandy soil in michigan? I would have never dreamed the soil would be sandy up there?
At this point in time we are done our seeding jobs for the fall. Temps are falling regularly in to the 30's at night and upper 60's during the day. Even had a heavy freeze the other night. But guys are still doing a ton of aeration and seeding right now. I seen at least 8 trucks today with aerators and bags of seed on them. Just blows my mind these guys do it so late in the season. They have to know from here on out the lawns they do will likely see little to no germination.
2013 Gravely 460Z 29EFI
2011 Gravely 36GR
2008 Gravely 160Z
2004 Gravely 34Z
1998 Lazer Z HP 48 (old faithful)