I don't know where those file dates came from. If I look at the github repo https://github.com/revarbat/BOSL most of the files are "over 2 years old". If I look at BOSL2 the oldest files are about 5 months and a bunch of stuff has been modified in the last few days. I think BOSL has gotten some bugfixes over the last two years, but no development. Note also that if you use the old BOSL I think you need to use the 2019 version of OpenSCAD to avoid getting warnings about undef. OpenSCAD mailing list-2 wrote > I'm studying how to find, download, install and use libraries. Probably > making heavy weather of it. Thought I'd start with 'BOSL' as it has code > that might help me make metric threads in my boxes, and possibly some > matching bolts. One thing that's puzzling me is which version I should > use. > As you see, the latest version BOSL2 is much larger, but oddly its files > seem to be more than a month *older*? -- Sent from: http://forum.openscad.org/

Thanks Revar. As for the dates, I don't recall either. But I can say that as a non-programming end user, I do have a hard time navigating github! -- Sent from: http://forum.openscad.org/

Thanks adrianv. As for the dates, I don't recall either. But I can say that as a non-programming end user, I do have a hard time navigating github! P.S. I may have asked this before...how do I edit a post after sending it please? Rather than almost duplicating a reply as I've done here. (Note that I am exlcusively using the web site, no email.) -- Sent from: http://forum.openscad.org/