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not true I used to use a 92s that is even older than that model, they don't sell it anymore, and I am able to make multilayer boards with it, granted it's a PITA to laminate the layers but I can do it. It's still faster and cheaper then sending them out. but I wouldn't use it for a production run.

Doesn't it become really thick? How you doing the connections between internal layers?

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I kinda like the idea someone here mentioned about the Ipod dock, but I can't get their interface specs without entering into an NDA, witch I sure is not free.

The iPod dock accessory protocol? It has been reverse engineered and is just plain serial.