Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
Strictly speaking DK have done nothing wrong. You have the same consumer rights buying used and new. You could have exchanged the crank or sent it back for a refund. DK offered to replace the crank rods and that was declined. They are under no obligation to do a partial refund. Could they have handled it better? Probably. Do they have to? No.