I am selling my Flex 3401 DA buffer with the Changebale backing plate system (4" and 6"). Flex has been used twice and the backing plate system is brand new. Comes with original backing plate as well. Nothing wrong with it, I just prefer my Porter Cable buffer over the Flex. I am asking $250.00 buyer pays shipping, insurance and any Paypal fees. If you interested please PM me. Thanks for looking.