After 900 hours of printing I had my first serious nozzle clog which did not clear itself with the standard cold-pull, hot push etc. I had to take apart the printhead however as I found out it was not that simple because of the housing design. A plastic tab, which to me serves no purpose, prevents the heater block/cooling-fin unit from coming out as a single unit. This also makes the reassembly very awkward and unnecessarily complex.
After I cleared the clog by taking everything apart I decided to modify the housing by cutting out the plastic tab. With that mod, the assembly was very simple, also if clogging occurs again, I can take apart the nozzle/heater/cooling-fin unit as a single unit. Another advantage of this mod is the simplification of the assembly, as I can apply heat to the unit with a heat-gun and properly tighten the nozzle/heater-block connection to prevent potential leaks. Picture below shows my modification.
I also documented my process with pictures if anybody is interested, proceed at your own risk as warranty will be void! The link is: