Yes. Exporting is disabled for purchased items. However, if you send an email to support@matterhackers.com we will be happy to provide you with the STL files.

@MacHume,

Ryan was referring to the Edit button in the upper left of the Library view, not the Edit button below the 3D view of the object.

@Panacaguy and @jvhilton,

Remove the following line from your End GCode, if it is there.

G28

Do not remove any lines like the following, but do make sure that all letters on these lines are uppercase.

G28 X0
G28 Y0

G28 is the command that tells your printer to home. It is safe to home the X and Y axis, but when you issue G28 without any parameters, it homes all three axes (including Z) and crashes into the bed. I'm not sure why the lone G28 would be in there in the first place. Nevertheless, this seems to be the case for some people.

I notice that you have Wipe on Retract turned on. This option backtracks the nozzle whenever a retract is done, in order to wipe excess filament off. In your case, its probably unnecessary and may be causing some of your issues.

Unfortunately the forum doesn't allow arbitrary file uploads yet. You can still post them using another service like Dropbox or Google Drive.

Lets see whats going on with your retractions. Go to the layer view, open the display menu on the left, and click the boxes to show moves, retractions, and extrusion.

Its not a bug, but I understand your confusion. The filament settings page only shows the settings for the first material. Settings for the second (or more) materials are taken from the presets. Do you have any suggestions of a better way to handle this?

You also raise a good point about the custom gcode variables. I'll see if we can add that.