Saturday mornings in Pleasant Ridge sound like mowers and very little else, one engine starting up as another shuts down all the way down the block. Caedo LLC keeps that rhythm on both sides of the house — the front lawn everyone walks past and the small square of backyard behind the garage that only the household ever sees, cut and trimmed to one standard. Grass runs away with itself in June and sulks in the August heat, and reading which week is which is most of the skill in it. Clippings blown off the walk and the drive left cleaner than it was found takes two minutes, and it is the part people remember. The route covers Pleasant Ridge and the neighboring Oakland County streets.