The overhang quality is on the low side of OK, but that’s without any particular configuration tweaking:
A few strands didn’t quite anchor to the far side of the overhang opening and hang down inside:
Curiously, the slab on the other side transitioned from the usual 0.10 honeycomb fill to completely solid about half way up:
As with all the other objects, there’s no stringing or oozing. Looks good to me!
The slic3r configuration, which doesn’t show the bridge speed of 100 mm/s:
; generated by Slic3r 0.9.8 on 2013-04-08 at 19:55:09 ; layer_height = 0.25 ; perimeters = 1 ; top_solid_layers = 3 ; bottom_solid_layers = 3 ; fill_density = 0.10 ; perimeter_speed = 100 ; infill_speed = 200 ; 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
The OpenSCAD source came directly from Starno’s object on Thingiverse.