As you can see in the video I insert a filament and keep pressing „purge more“ but nothing comes out until I push the filament from the top with my fingers (and afterwards purging works as intended without additional intervention). The filament in the video is Fiberlogy Fiberflex 40D. I never had such issues with this filament on my MK3S+. Does anyone have similar experience? I already tightened the idler screws by 4 turns, but it looks like the plastic part of idler just rests against the metal Nextruder frame. Maybe I should redesign the idler, so the small pulleys can reside closer to the filament feeding gear…

In case you use cotton pads for wiping the build plate with IPA and you own an Original Prusa Enclosure you may find this model handy