Hi
Today my roll in slot 1 ended during print, and last piece of filament was jammed in feeder.
I unscrew everything and left with feeder in hand.
Any “brutal” methods for pull not working.
So, I need open feeder?
Is any manual how to disassembly and assembly?
A lot of small pieces 
And feature requests: is possible in situation like this, not to ruining print (because printer waiting to make blocked slot free) just click "ignore this jam and use another (enter number) slot)?
8 hours printing gone…
How did the filament break into multiple pieces? That is what I would look into right after you cleanup everything. Unfortunately you will need to check everytube and maybe even open up the ams as well. The good news is that there is videos and pictures to do this:
https://wiki.bambulab.com/en/x1/troubleshooting
Search in there and you should see all the steps documented.
You can buy the first stage feeder for 35 bucks in the shop if you cant get it working.
A lot of small pieces was referring to feeder elements.
Filament basically ended during print, next extruder reverse filament but feeder not.
So, I left with blocked feeder and unfinished print.
How did you end up fixing?