I need to buy a tool to cut mortises. I've used a chain mortiser, and it took me about 5 minutes to take out most of the wood in the mortise. But I've never used an old fashoned boring machine. I only know a few timberframers, but all seem to have a boring machine in their shop, but some are on the shelf gathering dust. So, I ask, do they really work? If so, how much slower are they than a chain mortiser? I know they are quieter, safer, and less expensive.