Sorry to hear that, I need to work on it and test several clearance between parts but have no time (and money) for that. (It's also because of the SLS that can't be very precise on small details)
It's Beta, you can see the comments about that right on the "Beta Feedback" tab.
sorry about that.
yaniv@steven_kollross The DIY, but it's still in beta, you get the model and need to sand it a bit so the part will move. the SLS process make the model a bit grainy
I ordered one to myself and got it as 4 pieces, but somebody else also ordered it and he said that they 3D print it as one piece but it can't move although it was modeled according the instructions on the material page, maybe it's because the flat faces is too big so the space between them need to be larger.