I loaded the sketchup file I used, I will confess its not bug free but after adding the name of your choice if you run it through
It will fix the holes in the model. I lowered the regions in white so that it could be sliced in a fashion that allowed me to easily modify the gcode
I dropped in my gcode edit which set up a series of pauses starting at lines below for changing filament colors.
After slicing I used repieter host to identify the places to insert my pause code.
G91 ; change to relative coordinates?
G1 Z10.000 F7200.000; Raise Z?
G90 ; go back to absolute coordinates?
G1 X10.00 Y200.00
@pause Change Filament
G1 F2400 X96.93 Y96.14 Z5
G1 F2400 X96.93 Y96.14 Z3.10
Sliced with Slic3r
Layer Height 0.2mm
First Layer Height 0.3mm
Solid LayersL Top 6
Fill Density 50%
Solid Infill 0.7mm
Top Solid Infill 0.5