Hi Frans, First off, thank you very much for maintaining and sharing the MTF Mapper project — it’s an incredibly useful tool! If you find the time, it would be great if you could update the source files, test sample charts, and possibly the Ubuntu packages to the latest state. This would help users who rely on the packaged versions and example data for testing and calibration. Thanks again for your work and for keeping this valuable project available to the community! Best regards, Inspirer