Hey there!
Its been silent for a while I know. So here a little update. I made it up to 95% clean 65° using the standart speed profile 0.12mm without the aux fan. So the duct IS flawed or not being perfect aligned at least. 
Some minor adjustments and we are ready to go.
Here some pics:
Since Im short on time I will stop at those 65° and maybe start over again in a few weeks. This should be enough for most of the parts being printed.
And yeah I used pink PLA for prototyping 
Edit : Ive used the High-Speed settings this time. The older ones were printed on 30 mm/s for walls. So maybe 70° should be possible if you slow down.