Checking out TechnicBricks today I found a really neat invention by Barry Bosman. Why do I like it so much? Because I absolute hate all those single purpose body molding panel things that come with many newer Technic sets. I have a whole container full of them and I store them right beside a box of Znap parts. If I do build the set, I use those parts once and them throw them into the box never to be seen again.
But now that I know that they can be used as a fan blade, I will have to blow the dust off that box and check them out.