Reduce first_layer_speed and gap_fill_speed on 20% infill
Use honeycomb instead of line

It makes stronger products
Change retract and wipe settings
Change default profiles
Raise PLA temperature in hopes of getting it to print

Still doesn't anyway. Boo.
Fix z offset for FF Creator Left (PLA needs higher offset)
Lower the layer_height for 20% infill
Enforce 5 layers of structural support for structural print profile
Reexport profile with Slic3r 1.1.3
Bump up skirt height for 20% infill profile
Drop obsolete profiles
Update slic3r.ini
Reexport structural.ini
Reexport structural profile

New Slic3r really doesn't like an extruder setting of 0
Bump extrusion multiplier back up to 1 for black ABS

0.83 grossly underextrudes.
Reduce z_offset for FF Creator Left

Things weren't sticking to the plate
Revert retraction settings on FF Creator Left
Lower temperature on red PLA back to 190
Use higher speeds for structural.ini

We seem to be able to handle things a lot better after the pillow blocks.
Add fast 20% infill profile