http://www.thingiverse.com/thing:468872 with replications on different 3D printers + latest STL file updates!This Spider Rover can be simply clicked together with one and the same lock washer type. No screws required. Just in case you want to do more extensive research with it, you can add a motor. Pulley is in the files. The silver spider rover is 50% scaled down (not motorized), which needs the different named worm_gear_scaling.stl.Be adviced that you have to be good in what you are doing when you start scaling down below 80% or if you add a motor to get it walking!Printed on Ultimaker²Used UM2 Cura 14.07 settings:QualityLayer height (mm): 0.1 Shell thickness (mm): 0.3Enable retraction: yesFillBottom/top thickness(mm): 1Fill Density (%): 100Speed and TemperaturPrint speed (mm/s): 50Support type: None Platform adhesion type: None (e.g. leg_shoulder.stl could require Brim)MachineNozzle size(mm): 0.3 (yes 0.3 - you can check gcode with Repetier-Host)QualityInitial layer thickness (mm): 0.3 (shows yellow)Initial layer line with (%): 100Cut off object bottom (mm): 0.0Dual extrusion overlap (mm): 0.15SpeedTravel speed (mm/s): 150.0Bottom layer speed (mm/s): 20Infill speed (mm/s): 80.0Outer shell speed (mm/s): 50.0Inner shell speed (mm/s): 70.0CoolMinimal layer time (sec): 5Enable cooling fan: yesOccured problems: UM2 feeder underextrusion through moved hobbedpulley to the outer side on the motor shaft. Followed by slight ticking sound.Moved hobbed pulley back about 2.5mm. Last step of filament change has to give you a hard powerful knocking sound when new filamentis coming out of the nozzle (before you then select PLA/ABS type)Scaling: For example crazy 50% - It's easier to scale all leg_pins_..stl to 0.48 for X/Y and Z=0.5 instead doing sanding. For 1:1 no sanding is required !If you really have to do sanding - use a common nail file.