Failure to feed. Missing Teflon Bushing?
New Core One+. Printed a dozen parts successfully. Had a print fail to feed half way through but the printer "completed" the job. The filament feed gear would vibrate but not spin and the feed motor/gears made a bad grinding/clicking kinda noise. Took off the gear cover plate and found marks from the planet gears on the screw lugs of the cover plate. A Chris Riley youtube video on the XL nextruder disassembly highlighted a white bushing that lives between the gear cover plate and the gears, my printer didn't have that. Do I need that bushing or has the nextruder design changed since the XL?

RE: Failure to feed. Missing Teflon Bushing?
The white washer was removed after the MK4. That is, it's not used with the Core One. I think what is happening is the planetary gears are not seated correctly in the outer gear.
Is this a kit or pre-assembled?
RE: Failure to feed. Missing Teflon Bushing?
Its Pre-assembled
RE:
Interesting. First time I've seen this. The chamfer on the planetary gear ring is supposed to prevent the gears from slipping out like this. Meaning they should always be flush with the outer ring. You will need the PG gear adapter to properly reseat them. I would contacting support at this point.
RE: Failure to feed. Missing Teflon Bushing?
Simply pushing on the gears moved them back flush with the ring gear.
I'm confused about how a chamfer on the gear ring can prevent the planet gears from moving out. Do you know how that works?
RE:
Sorry I misspoke. I meant to say if the gears are properly seated with the chamfer facing down (away from the cover) then the gears shouldn't be slipping out like that. The chamfer just makes it easier to assemble. Anyway, this is the first I've seen of this type of issue. Still advise contacting support.
RE: Failure to feed. Missing Teflon Bushing?
Thanks