Prusa i3 YZ Endstop Mounts

___Updated October 6, 2014: A front-accessible adjustable Z endstop.___
___Updated July 10, 2013: Made the clips longer by default.___
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This is my first use of a simple concept, to mount parts on the printer using clips that span two rigid points, either from the back of the frame to the front the M8 smooth rod, or between two rods. Parts built this way should be more secure, require no extra hardware, be easy to add/remove, and complement the i3 design.
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The first revision only incl