This mod of the original Ratrig V-Core 4 vertical tool board mount allows mounting of the O2 tool board from LDO by Robert Lorincz. It retains the same mounting pattern on the VC4 toolhead but requires the 18mm standoff that comes with the O2 tool board to mount (if using the filament sensor). The motor also should be rotated back to the original position, opposite the Ratrig VC4 instructions, in order for the stepper motor cable to reach the connector on the tool board. Clearance is provided for the Orbiter filament sensor also. This model requires (2) M3x4x4.6 brass heatpress inserts, same as used on the Ratrig toolhead. #1