As somebody not very familiar with CAD/3D printing, etc how hard is it to produce it myself (couple units for personal use)? What would be the average cost? Did anybody do it?
It's just the "outline" of the controller/puck, it doesn't include internal features for the internals. You won't be building your own controller off these files (without a lot of work).
It's more helpful for making things that conform to the controller, like a holder or stand for your desk or carrying case.