I design STL files in an ADHD Style, jumping from what interests me to the next thing that can help me or entertain my children while I work. I offer both Personal Use Licenses and Commercial Use Licenses for everything, just a few dollars in price difference. If there's a file I haven't gotten to adding the commercial license listing yet as I'm trying to go through the back catalog just message me and I'll bump it to the front of the line. :)