Neil,
You know better than that. JD has not achieved its reputation in this way, and I doubt that mower will end up with someone else. If a dealer with JD does that I suspect that dealer will be in trouble with corporate. Four of my dealer friends, who between them have had two or three take backs said that the JD rep wanted the machines back so that they could be gone over. To all: bear in mind JD, as of 2006, could operate the entire company on their parts division for replacement parts and upgrades for existing machines. It would and should be of no trouble to them to take back a problematic machine to keep a happy customer.
John M