contest

I am building an Estes Yankee for a "B" streamer duration contest. Knowing that paint will add weight I'm not sure if I should paint or just leave as-is. I am pretty good at painting and it will have a smooth finish, but that will require 3-4 coats of primer and a few coats of paint. Just...

I am hosting a 3D design and printing contest. I would like to see the product utilized and not just a concept. What should the rules be? Rules: It must be your design and not off thingverse etc. Not just a concept. Show utilization or flight. Post an image with the part, rocket, jig being...