Hi Friends, just for Fun 
+Peter van der Walt oh thank u … I’ll fix this 
I guess the JOKI 503 are perfect for you. 0603 it’s too small maybe for this nozzle. I use a NEMA8, but a NEMA11 are also possible, if you find a stepper with a 5mm hollow shaft 
I love it Frank. As much as I realize you did this for fun, it does get me excited for summer 2016 and having this all achieved.
@jlauer Crossing Fingers John
I guess the hardest part are to glue this processes together. But … i work on this 