UPDATE: Adding "fixed" versions of the STL to resolve issues with some slicers. This is an updated version of: http://www.thingiverse.com/thing:52959 There are four variations derived from two options. What's new: Requirements: Build Instructions: Optional But Recommended Step: Clips: If you are going to use the clips, they should each be printed separately for maximum quality. Once you have everything in place, a few drops of superglue in the back should do it. Leaving them un-glued in the front may make docking easier. It's up to you, give it a try either way.