Nope, just been using it for years. I think Ray McKaig either wrote it or is the current keeper of the project. It’s been immensely useful.
On a similar note, are you aware you can get ANYTHING in McMaster Carr’s catalog in STEP format?
I’ve got libraries of their parts that have all been downloaded and put into named blocks. I haven’t done the entire catalog (that’d take years) but mostly stuff I commonly use like bearing pins, dowels, oddball bolts and knobs, etc. It’s a great resource.