Single walled print at 0.17mm layers, with a 0.25mm nozzle on a MakerGear hotend.
Slic3r gcode parameters are after the pictures.
; generated by Slic3r 0.7.2b on 2012-05-06 at 01:09:14
; layer_height = 0.18
; perimeters = 1
; solid_layers = 4
; fill_density = 0
; nozzle_diameter = 0.25
; filament_diameter = 1.73
; extrusion_multiplier = 1
; perimeter_speed = 45
; infill_speed = 80
; travel_speed = 100
; extrusion_width_ratio = 0
; scale = 1
; single wall width = 0.28mm