Prusa i3 MK2 Y Belt Holder and Tensioner v5

UPDATE 4/21/2017 - Redesign! It now uses the same small 2mm x 9mm wood screws, M3 screw and M3 nut that came with the Prusa i3 Kit but this time it all goes on a rear plate, easier to install and remove and stronger hold. After a few months if use I noticed my previous design would start to bend a bit due to its design, that won't happen with this design. I printed it with custom supports only on the rear section as you see in the photos. At 75% infill, printed them flat as you also see in the p