Printed and assembled a Saintflint extruder. Luckily I had a small hobbed pulley in stock that fits it perfectly. Pairing it with a Kysan NEMA17 stepper motor with decent torque. Like to try it out but still have to find a way to bolt it to my P3steel chassis.
@Bajdi_Electronics , Can use back stepper screw for fix it on frame.
Generaly we dismount 2 diagonal screw change it with new screw 5mm more long and before remount place 4mm plate it permit to fix it on profile. in your p3steel feel no have issue for apply it directly on frame 
#saintflint @Michael_Memeteau