I talked to one guy who put his diamond awl tip in his drill press. He didn't turn it on, but he set the angle and was able to get all the holes cut straight through the piece he was working on. I've never tried it but it may be something you might think about. There is an arbor press type tool with a chuck for just that purpose. Here's one listing but they are priced all over the board from $60 to $150.