I would check to make sure the wingspan isn't to long for a standard T hanger. Most T-Hangers will not accommodate a 337 with the Flint extensions. I would check the TQ tube's in the flap mechanism. It will be pricey if some non aware mechanic or owner screwed the wrong sheet-metal screw into the wrong location in the access panel.
Flint tanks-
http://www.flintaero.com/index.html