COOL MAN, FAULHABER is a very good motor, GERMAN QUALITY
about STROKE adjustable on ROTARY is not the same as COILS, becouse the motor always run at same RPM with SHORT or LONG STROKE.
COILS machines more long is the stroke more slow and punchy is the machines, more short the stroke, more fast are, on ROTARY is not to much different this, the only thing change on ROTARY with LONG STROKE, the needle gonna grab more ink inside the TIPS, that's all, but have exactly the same SPEED and HARD HITT of a SHORT STROKE, is just little bit different LONG or SHORT stroke on ROTARY , u cannot feel the difference same as COILS, more STROKE on ROTARY create more vibration,sure

your machine look like have a loot of GIVE, like NEUMA first version, how about for done LINE ? no problem ? becouse one of the BAD things of the NEUMA is line with them

GREETS...