One thing that helped me was finding detailed models designed specifically for dual extrusion—it makes calibration much easier and reduces wasted filament. For example, I recently tried printing the Spaceballs Eagle 5 from Gambody, and having a well-tested STL file made a huge difference in achieving clean color separation and sharp details. https://www.gambody.com/premium/spaceballs-eagle-5 offers files optimized for different printer types, with instructions that really help streamline the process. From my experience, taking the time to study the slicer settings, layer heights, and cooling can significantly improve results, and having reliable STL files for testing can save countless hours of trial and error.