I can speak for Don's case since it involves 5-0dro. I will not get into the "nitty gritty" details (nor will I get into a web argument over it) but in general, this is what happened:
Two special order products (intake flange sets) were purchased then he had some installation issues (roughly 2 months after the purchase) which we worked with Twin through many emails to advise on the correct installation procedure. Don was dissatisfied with that procedure and insisted that we take the products back.
Even though we clearly state that Twin Motorcycles parts are not returnable (mainly due to the international shipping costs involved), we offered to return the products less the shipping costs.
We're sorry that any customer is ever dissatisfied. In this isolated case, we feel we did as much as we could under the circumstances to take care of the situation. I can assure you,as can our loyal customers, this is not the experience with nearly 100% of our customers and the Twin Motorcycles team has been very supportive with any customer questions or concerns that have ever come up since we've been a US dealer for them.