I've be cutting some big rounds, and since the logs are on the ground, I cut 85% through, then rotate the log and finish the cut. Usually, everything lines up and the finishing off works fine. Often, however, I end up cutting more than necessary, with thin slices of wood between the original cut and the second one. Sometimes I start the second cut within part of the first. Other times I start the new cut sighting the two ends of the first. But it is never guaranteed to work. Is there a better way?