Since my Y belt tensioner worked out so great I decided to make a belt tensioner. It has a similar layout and works the same as the Y belt tensioner. I have tested it and it works.
There's also a X engine mount to go with this
X engine mount: http://www.thingiverse.com/thing:1730523
Y belt tensioner: http://www.thingiverse.com/thing:1704100
Y engine mount: http://www.thingiverse.com/thing:1704123
What you need
Use everything. The additional you need is:
10x M4 T-nut
1x M4x40 screw
1x M4 Nut
1x M4 washer (optional)
How to set up
Mount and install the exact same way the old bracket is installed. The pulleys are installed without the nut and the washer. Use the nut and the screw.
M4x40 goes through the mechanism and the backplate.
M4 Nut is pressed into the turnwheel.
Printer: Tevo Tarantula