vsp, Oh, wow.
Hot ends are very fragile.
Did not know that. The moulding around the hot-end on my printer was packed-in with filament, making it very hard to print — it harmed the adhesion to the print plate rather terribly. The interior of the module (the plastic casing for the hot-end) was also slathered with hardened plastic, breaking the z-sensor of the hot-end.
Also, in #3dprinting news... I learned how to replace a hot end today.