I bought one of these machines about a year ago because for years I've had alsorts of ideas about building my own design router but didn't get anywhere past dreaming as I have little electronic knowledge. It is a great training tool, it's modular so it's cutting areas can be tailored to what you want within reason by buying longer extrusions and screws.
I only use it for light work such as cutting depron and balsa wood.

I now feel confident enough to start building a much more substantial moving gantry router.

I rigged up a brushless spindle for the router, photo attached. This was made to fit in the original mount. Mk2 will have pillow blocks rather than the flanged bearings of Mk1.
A torque arm stops the motor from spinning.Click image for larger version.  Name: Original brushed spindle and brushless set of parts..jpg  Views: 399  Size: 295.4 KB  ID: 26819