Prusa i3 Updated X-Axis Motor and Idler Ends - Remix

So I liked Endlesshunt's axis for the I3, and I modified a few things to fit my needs:

- added screw holes to thighten the linear bearings' clamps
- moved the screw holes for tightening the horizontal bars so that you can move them without getting the whole thing off
- removed the opto support (I prefer to clamp it directly on the bars)
- removed the internal wall on the motor end

I printed one with PLA and one with ABS because I didn't want to get another spool... It should be fine in