RCU Forums - View Single Post - Need Help Finding Replacement FB MB-339 Brake O-rings
Old 02-08-2016 | 05:44 PM
  #5  
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gunradd
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Gary it's the Chinese new year. You won't hear from them until Feb 16 or so.

Pretty sure the flat part is wear. Just grab an oring that fills the gap and give it a try.