I might have time to gather some windfalls on 'Sunday afternoon. Busy until then.
Order a grafted chestnut crab or graft your own if you want a sure thing.
I have about ten grafted chestnut crabs and I have had them dropping for the whole month of Sept. The tree on the south slope is 99 % done, but a few apples on the north slope still exist. This drop is about 10 days ahead of most years in central Mn.