Barry, would it be possible for you to liase with The Towers and suggest a scheme whereby owners of potentially faulty Aura, who are currently registered for the Beta test, can return them direct to Humax (either for replacement or refund irrespective of where they were purchased, as long as full proof of purchase is provided)? Returned items should require details of issues, perhaps a questionnaire could be drawn up.
This way, units can be individually tested against the reported faults.
Restricting this to the Beta team will give the developers the opportunity to improve the Aura in a more hands-on manner by examining persistently faulty units directly.