zenith build

Hi - I am a very new Zodiac 650B builder and am looking for information on installing the piano hinges on the Elevator. I have looked through the build material and due to the photo quality I can not tell if the hinges are installed with the Flat side up or the radius of the join up. Can anyone...

Good morning, I recently bought a project. The vertical and horizontals are close to finished. I wanted to try my hand at scratch building. What is a good source for aluminum? I though I would buy spars and difficult pieces from the factory but hoping to build some parts also.