Interesting, I need to make a scythe, this would make it alot easier to transport.
Ooh, yes definitely make it separating if you can. Big props are really cool... until you have to pack them or carry them through small spaces. Especially if you carpool with others - the smaller and more compact you can make your props, the less likely they are to get damaged by other people's luggage too. I would think you could make the shaft in 2 pieces and make the blade itself detach for easy transportation.