i3 X Carriage + Rear Accessory Mount

I wanted to mount accessories to the rear of the i3 X axis carriage. So I remixed the standard i3 x carriage to include a mount on the rear. I also widened the gap between the two belt holders and added a hole to zip tie the belt at the bottom.

I designed this primarily to mount my dual RJ45 breakout board https://www.thingiverse.com/thing:3047447/files

But, there is no reason why other accessories couldn't be mounted on the back using this.