Being in the US, I indeed purchased mine through Amazon. But, in reporting the issue to TWC, it's been very easy and straightforward dealing with them directly for the returns. And, interestingly, while they had me ship the problematic Tricorder back to Essex, Charlotte (with their Customer Service) stated the replacement will supposedly be coming from their warehouse in Chicago, USA.From reports of others that have returned theirs, Wand sends them pre-paid labels to return the Tricorders directly back to them. ... They have a supply at their location just for returns.
PS: When I had my original TWC Tricorder, I noticed in passing that my top 'door' didn't open flat. But, since I'd not yet seen these posts on the issue, I didn't really think much of it, figuring that was simply the way the door worked. It will be interesting to see if the new one (for which the UPS label has been printed, but which has yet to be received by UPS) has the issue or not as well.