I have no first hand experience with subcontracting east asian manufacturing companies, but rumor is that parts subbing on the factory floor can be a real issue with some contractors. If this is the case it's possible the early production units were made with 'B' parts and Eastech is trying some 'C' parts to test the water, or something like that. Also, a 5 unit 'beta test' isn't much of a beta - no disrespect to the testers, but you really need more diversity than 5 people can provide.