3D printer Core X-Y

This is a Core-XY machine that is almost finished. Most of the parts have been printed and just waiting on some parts to assemble the whole shebang. The crossing of the belts at what I call the front always seems to be the big problem. I find that this goes away by just twisting both belts one 180 degrees. One belt one way, the second one the other way. This way the flat side of the GT2 belt cross each other in the middle without any problem. This is at the location of the green sphere in the screen shots. The design also makes it such that there are no uneven forces on the parts. All forces are in the same plane not higher or lower which will cause torque on the sliding parts.
The finish built is about 50cm square out of 20/20 aluminum tube and the whole is very rigid.
So far everything is working great. More pictures coming in September/October 2018