Assembly, calibration, filament load/unload and first couple prints went without a problem 
Then on the 4th day the filament loader stepper motor stopped working mid-print, was stuck, could not unload/load 
Removed filament manually (quite a hassle) proceeded to debug - no motion whatsoever, shaft was only rocking back and forth - “sounded” either a) open winding or b) burnt driver or c) faulty wiring.
Proceeded to test winding impedance with multimeter, one winding OK, other at high impedance - diagnostic: option a), faulty stepper 
Need a replacement, contacted local representative, printer and a bunch of filaments standing on the corner collecting dust - this is no fun at all… 