Been having a real problem turning lately. Get to where I can't breath and wake up with my eyes all puffy. Last thing I turned is a piece of black walnut. I got physically sick, almost vomited from coughing. I tried a Resp-O-Rator and it helped but didn't help the puffy watery eyes. So I bit the bullet and ordered a Trend Airshield Pro. WHAT A DIFFERENCE! I'm very happy with it so far although I just got it and have only been able to try it once. They are expensive, but so is a lung replacement, if you can get one. I think it is really going to make turning enjoyable again. The cheapest place I could find to get on was from Performance Tool Center. $298, no shipping or taxes.