Hi All:
 
I have a new-to-me Kelley uncapper (basicly a mini-Cowan I believe) that I
am using for the first time.  I am very pleased with it's handling of wooden
frames, but it likes to chew up and destroy or clog with pierco one piece
plastic frames (because of their flexibility).
 
Would anyone with a longer experience with one of these uncappers have some
suggestions on adjustments I could try to remedy this.
 
Thankyou, Stan