Started soldering the three remaining stepper motor driver boards today. I'm glad I left them till last, they are more complex than the other boards, and have quite a mixture of components and headers. Print out a resistor colour chart, or label your resistors as there are several different values in different places.
I'm still impressed with the RRRF boards, they're very well printed and the instructions are good. On most of the pictures you can see the resistor values to help cross-check after you've inserted the components.
The first board is 95% done. All I have left is the wiring and connectors, then testing :-)