Dual Extrusion_the parts doesn't assembly each other

Hello Repetiers,
I'm writing from Italy and I'm an happy Repetier User with my Prusa Rework.
I tryied to prepare a dual extrusion using the "drag and drop" procedure to align the two parts. 
The problem is: parts doesn't assembly in the graphic window as you can see in the following video.

Could anybody help me? Thank you so much


  • Your original stls are positioned wrong. What this grouping does is using the same transformation on both stl files. That means the creater must have them in original at correct relative position and not change coordinates during export.
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