I have the Series Pro2, I spent a small fortune recently and purchased some normal Raise3D Premium 1.75mm and the Colorful PLA 1.75mm filament. I finished off using the Blue Premium and decided to try the Black Colorful PLA 1.75mm filament. The filament feeder gears were having a devil of a time and basically was jamming. I cleaned the passages with the rod provided by Raise3d and opened the gear access and cleaned, vacuumed and tried adjusting tension. Tried again and still was jamming. I went back to the Raise3D Premium and TADA! no problems. The Colorful seems to have a different texture (rougher) and not as round?

r/
Jim