I twitch a little every time I read something like this: > Precision CNC milled from aircraft grade aluminum to 1/1000ths of an inch tolerance What you need a

I twitch a little every time I read something like this: > Precision CNC milled from aircraft grade aluminum to 1/1000ths of an inch tolerance What you need aicraft-grade aluminum for? And a 1-mil tolerance? Are you building a really tiny aircraft? "Premium design" stops when the design choices are the best you could ever need. Beyond that, it's no longer a matter of engineering, it's about far less respectable traits.