Bits, Feeds & Speeds, and Accuracy

Here is my Hitachi Router setup (but I did the rigidity mods). This now has a dust shoe and a tachometer hanging on to it as well:

It probably ran 10-12 hours per week for at least five years now. And the brushes are still very close to original shape. It’s crazy. It probably has to do with considerable horsepower and very light duty on a cnc machine. Might also be that it is a Hitachi. It is also very, very quiet at low rpms. Even quieter than my Makita on my smaller machine.