Why not rent one? They are usually worn in a little. The chatter usually comes from too sharp a reamer or too much clearance. I agree with Scorch. I had problems with Clymer a couple times and have not used them since. I was making them, then someone told me about rental places on the net. I do so little work now that renting works out great. Sure a lot faster. I don't know who makes them, but I have had no problems yet.