Right, if you still want to improve again the app when you are done with your bugs due to the new memory management and with your keysets loop system, I advise you to think about providing another panel to add custom keysets in pierogi. I have no idea how the files you find containing the manufacturers keysets work, but I suppose it's a standardized format. Using this kind of files found on the internet, the users could be able to manually link the keys to each button in pierogi, so that you are not forced to do it by yourself for all the new models in the future (by this way pierogi would never be obsolete ).

Thanks a lot again for your work copernicus.