I'd like to say thank you for the phenomenal effort and hard work that has been put into librecad. I'm currently running on Linux Mint 18.3 and admittedly I did have a couple of wrong turns at first. I first installed an old slightly buggy version from my distro package repo and then had no luck with the stable PPA since there are were no built packages available for distros based on Ubuntu Xenial. Once I realized the error of my ways, I built the latest available 2.2.0 RC from source and it really is excellent. Thanks again, Joe.