There is a?railsback command in the Scala.? You should be able to apply that to any tuning, including 12EDO, and then export a sysex file that you can load into the DX7S.
You can start here and enter your intervals (i'm not sure what to tell you if you want to do 12EDO):?
You can then export the scl file to the Scala desktop app (Windows only, Mac version is not working right)
Run the railsback command (see list of commands:?
A demo video of exporting scl files to various sysex formats: https://www.youtube.com/watch?v=-QNnVndGLmw?
