Building My First CNC Router, Looking for Advice & Other Info

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They're a little bit bigger than the usual choc-block style connector strip, but I've used a few of these which seem to work well. They also have the advantage that because they're spring-loaded, they are much less sensitive to vibration than screw terminals. Also, each wire goes into its own little socket so no need to twist wires together as you do with choc block - always end up chasing odd strands, trying to balance the lengths of wires, etc, when I use them. Don't know if anyone sells them in smaller quantities.

I thought I was the only one using those connectors...

Another advantage of them is the wide range of wire diameters they can handle. In my opinion, they are much better than screw terminal blocks. Basically, the only thing I find to their disadvantage is that they don't have any good way of fixing them, so if you are in need of using a few in a small space then the looks are not as nice as using screw terminal blocks. My PSU looks a bit messy because of this, but never the less, I find them very nice to use and practical.