I am modeling in AutoCAD for Mac, which is quite annoying, because, by comparison to the Windows copy, the Mac copy lacks proper materials facility and a lot of other features. Even basic stuff, such as Copy to Layer. But oh well, such is life. AutoCAD is what I know :)<p>No beta units yet. My previous source for carbon fiber CNC production is out of that business. We just acquired an X-Carve CNC machine, so I&#x27;ll be starting on cutting the frames as soon as the holidays are over. I have a previous design which has a similar layout, but this should be lighter, and about 25% more thrust, so it will be very fun.<p>As for RTV, I have to research that. I really like the toughness and finish of the nylon parts from Shapeways, but the price point for them is insane. It&#x27;s fine for prototypes, but for production I would love to do injection nylon plastic. I never done anything like that though, so it will be interesting to research and do.