I also have goine the MicroSwiss upgrade - a co-worker convinced me to since he's had great success with it.
Got 2-3 prints done - and then it clogged solid.
In my haste to try out this upgrade - I had forgotten to adjust the retraction :-(
Now - my question is - how do you unclog these things?
Heat it up to 250?
I took mine apart, and both the nozzle and the cooling tube are clogged with filament.