Warp9TD SmoothStepper board about a week ago. I just had a chance to install it in one of my CNC controllers. I mentioned I ordered it a few posts back.
The picture there did not give a good impression of the actual size of this diminutive surface mount technology (SMT) circuit board. It is small but mighty.
There is an added bonus with a bunch of pictures of the Proxxon PD400 in action. I used it to make standoffs for mounting the SmoothStepper.