like the more robustness; but... the open spindels are a worry (debris!) ?
Upgrading the C-Beam machine
Build in 'Other Style CNC Mills' published by Ronald van Arkel, Jan 20, 2017.
So we have new plates, stronger motors, belt drive reduction, but what should we do with them? In this article you might find the answer you were looking for as we took an “old” C-Beam machine and started to upgrade the X/Z body and added more torque and precision to the Z-axis.