This thing is a cool little carrying case for my 6 inch by 4.5 pitch props for my 280 Versa Copter from FliteTest.com The case holds 8 props on 2 posts. There is a little bit of space around the posts in case some people have props with smaller bores in the center hub. I designed this with the intention of just putting a rubber band around the box to keep the top on, but it turned out to be a very light friction fit where the crate top fits down around the posts. If it loosens up over time, I'll go back to my original plan of using a rubber band.
Chinese Clone of an MB Replicator Dual
This printed fine on my makerbot clone with no supports, and there was no garbage to clean up under the diagonals. Raft probably wasn't necessary, but I always use one.