From about 20 years ago, when they first came out with the windows version of PowerTools, in the Win95 days if I remember right, until about 10 years ago when I changed focus in my work I put many a device into my own library. Wasn't terribly difficult; couldn't imagine it would be any more difficult now that it was then. The initial library for the first windows version left quite a bit to be desired, they got much better with each new version.
