I have been having a problem with the filament breaking off inside the extruder. Since, haven’t solved this problem yet, I have had to remove the extruder open it up remove the jam and reinstall it. I have done remove the lam on the extruder 6 times in the past 24 hours. This has happened so much that Iam considering purchasing multiple tool heads, But to make this a really viable option the tool head or at least the extruder needs have a quick change feature. This would be a big help and simplify the removing the jam. This has the added benefit and I believe this one is huge one could have multiple tool heads an example would be a toolhead for each nozzle diameter. WIth a quick change feature one could easily swap out the tool head for a nozzle.
FYI, I don’t know if this worked ,but I uploaded a photo of the jam that I have been getting.