Hello, if anyone is able to help that would be amazing. I'm setting up my 3d Chameleon, I've had some issues that I've been able to fix, but not this one has stumped me, Colours going into tubes #1 (White) and # 3 (Green) extrudes good, #2 (Black) gets a little stuck, #4 (Red) doesn't move at all. I am able to move the filament in all tubes via hand, and pushing on the filament in #2 as it is extruding helps it through. Nothing I try helps #4 through. I've provided a video to try to help. Any help would be greatly Appreciated.