Filament was sometimes spaghettified from my Bulldog XL. Closer analysis of the design showed that there is quite a large gap from the hobbed surface to the exit hole; this 3d printed accessory fills the gap and eliminates any deviance of the filament. As a side effect; it also makes it easier to feed in the filament.

Instructions:

• Print with high infill (95% perhaps).
• Clean up print with sandpaper; it's quite a tight fit so any protrusions/blobs will make it impossible to fit.
• Drill holes out to 3mm for 1.75mm filament. This design is untested with 3mm filament.
• Fit into Bulldog XL assembly, ensuring that the bearing can rotate freely.
  If not, then it could be one of many things such as bad print scale, printer prone to unsized holes or needing to clean up the inside face with sandpaper and/or scalpel.