I thought to mention that AVN Swiss upgrade parts are worth getting.
I use 0.2mm nozzles a lot and have done some wiered and wonderful mods to get the standard ones to work consistently on a MK10 extruder.
AVN Swiss have developed an all metal set that works very well. So well that I am printing at a speed of 35mm/S rather than the 15mm/S I was before. the resultant print quality is also a lot sharper between the two setups.
so I highly recomend changing.