If you ever cut/turn any greenj wood (Pine, etc.) that makes long curls, it might be worthwhile to cut out the 'bullseye' type of casting. Be sure to smooth over the cut areas just to keep from messing up the air flow even a little bit. Look at your picture #4 to see what I am referring to. Many have had this thing to get jammed and quite rapidly according to the 'war stories' posted on other sites that discuss Mr. Thien's marvelous device. (Thank You, Mr. Thien!)