Tildarc CoreYX

After printing for a few years I had a wishlist of features:

* CoreXY (although this is really CoreYX)
* Its easier to tune than delta
* Easier to scale for XY than
* Delta Arms get hard to keep rigid
* Cartesian beds become really heavy to move quickly
* Easier to enclose
* All metal frame for rigidity (2020 frame, MakerBeam platform)
* Rails for repeatability
* TMC Drivers for sensorless XY
* BLTouch for Z probe
* At least dual Z for stability and auto square
* Hemera Hot End for flexibles and reliability (I went Direct Drive)

I hit all of those with this iteration.


Why is this a CoreYX? Because the rails mean I have to mount the Z rails along what would traditionally be the Y-axis.