Manufacturing and supply chains, especially international, are tricky. Every startup is pressured to commit to aggressive timelines that almost always see delays. If I were one of the early orders, I'd be anxious too. However, its a good sign that they are responding to emails, so this looks like a manufacturing delay, rather than a scam. This is going to revolutionize flying, and I look forward to purchasing someday, once I see some initial feedback from production devices.