I have used a Darex M5 for many years. They are no longer manufactured by Darex, but they show up on eBay regularly. M5 parts are still available from Darex. They usually got for 500-600$ depending on condition Three chucks are available 1/16 -1/2, 1/2-3/4, 3/4 -1-1/8. You can sharpen a...