I recently picked up this old Disston. IMG_20200823_114506996.jpgIMG_20200823_114452139.jpgIt is stamped on the plate 5. It has a very aggressive tooth pattern but once it gets going it can rip.The problem is starting a kerf. I have been using a less aggressive saw to start a kerf and then come in with this one. Is there a trick to starting a saw like this?