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To Terrahash,
Please post screen shots of all 4 orders with Avalon. This obviously makes a very large impact on order ship date estimates. Publicizing any workplan (gantt charts, spreadhseets, etc.) you are working to would also be very helpful. Transparency is key here if you want to stop getting Paypal claim notices in your inbox.
In fact, If you are running into any problems I'm sure some of your customers would be more than willing to aid in any way they can since it means they will be getting their miner sooner. All you have to do is ask.
Agreed. Terrahash, if there is anything that the community can to do help, I'm sure you will get an overwhelming response if you were to ask.