This object from whpthomas’s collection exercises the deprime operation in Sailfish, but it seemed like it’d be useful to verify the Marlin settings in the M2:

From the other side:

Yes, that was rather anticlimactic. No ooze, no stringing, no surface finish blemishes, just the finished object on the build platform’s glass sheet.
I like that!
The slight bumps on the sharp corner edges seem to be due to the crazy-high perimeter and infill speeds I’ve been playing with, although (I think) those are also where layer changes occurred. The first layer height came out a bit short, so there’s a small flange around the object’s bottom edge; I was figuring out how to get a precise level across the entire surface and stabilize the Z-min switch operation.
The slic3r configuration:
; generated by Slic3r 0.9.8 on 2013-03-29 at 20:51:15 ; layer_height = 0.25 ; perimeters = 1 ; top_solid_layers = 3 ; bottom_solid_layers = 3 ; fill_density = 0.10 ; perimeter_speed = 100 ; infill_speed = 300 ; travel_speed = 500 ; scale = 1 ; nozzle_diameter = 0.35 ; filament_diameter = 1.70 ; extrusion_multiplier = 0.9 ; perimeters extrusion width = 0.40mm ; infill extrusion width = 0.40mm ; first layer extrusion width = 0.39mm
No source code, as it’s directly from the STL on Thingiverse; I have no idea which modeling program he used.