Man, I'd try something else. There are numerous free tools that will do a much better job of it. I've never seen anything do a worse job.

Reminds me of the time my brother-in-law, a carpenter by trade, was at my house. I had built a simple temporary work bench in the garage by cutting 2 feet of the the end of a 4x8 sheet of plywood and adding some 2x4 legs. The edge I cut was pretty crooked and my brother-in-law asked what I'd used to cut it. I said I'd used my little circular saw. He looked at the cut again and said, "Did you turn it on?"