I have got lots of feedback from people who need an extra motor driver for their extruders. Most of the users have drivers for their existing CNC setup. When adding an extruder for their CNC in order to use it as 3D printer an extra driver comes to agenda. I made lots of test with different types of motor drivers and I choose the best 3. Here is the first one Allegro Microsystems A3977 Stepper Motor Driver IC. Our first design is based on this old but great chip. I am happy to say that more drivers are on the way. You can read more in the product page