Add filament entry for natural PLA
Lower extrusion multiplier for red PLA
Lower red PLA temp to 200
Don't use 0.1 top infill extrusion width

PLA can't handle it.
Set skirt height to 1
Drop brim width to 1
Use ultra-low first layer speed

This helps get the thing to stick
Set default and first layer extrusion width for 35% infill
Bump layer height to 0.2 for 35% infill
Update slic3r.ini
Update z offset for FF Creator Left
Add 95% infill option for fine-tuning extrusion multiplier
Use solid support material interface layers
Drop z_offset of FF Creator Right to 0
Remove top_infill_extrusion_width setting on structural profile

It prints badly with PLA
fixup! Use solid support material interface layers
Don't specify support_material_threshold on 35% infill profile
Use rectilinear infill on 35%

FASTER! Well, we only really need strength on the structural model
Bump up perimeter speed to 120 on 35% infill

We have a slow_perimeters speed, and an external_perimeters speed which should
be good enough for anybody.
Drop layer height on 35% infill profile to 0.1mm