He left the review before I received the notecard asking for the refund. Yes his fault for not reading and mine for giving in. To me it's not about winning or losing, it's about doing the right thing. even when the customer is clearly wrong, the old adage still applies of "the customer is always right." He can keep his 20L and I gained a whole new outlook to using and selling on MP. Thanks for responses everyone, all were very insightful.
Donni<3