The new version of Morse Runner now adds ARRL DX as a contest you can practice for. From the announcement:
"CQ CQ CQ - Morse Runner Community Edition - v1.82 is here!
The Morse Runner Community Edition has already added the ARRL DX, ARRL Field Day, CQ WW, CWOPS CWT, and NCJ NAQP contests to the original CQ WPX and HST modes. Now responding stations might send cut numbers for realism. Download it here:
https://github.com/w7sst/MorseRunner/releases/tag/v1.82 Next the project will look to provide additional contests, new features, future N1MM integration and usability enhancements. Your feedback, input, and help is appreciated. Users can do this at
https://groups.io/g/MorseRunnerCE. Developers can find or join the project at
https://github.com/w7sst/MorseRunner. We hope you like it, 73 de the MorseRunner CE team."
Morse Runner is a wonderful tool to help you practice for an upcoming CW contest. It's helped me a lot. -- 73 Jim K6OK