I think the codes for the 4 strings in [midi_et] should be as shown below.
413591475CDB1E06=GP Slider 1
41322B475CD83ADD=GP Slider 2
412EC5475CD557B4=GP Slider 3
412B1F475CD207CB=GP Slider 4
See the pics.
PS: Is something wrong with this string below? => see the link:
https://forum.cockos.com/attachment....9&d=1569280787
45FD9E199D6417A2=Set track playback offset - (does not translate)=> appears in the session [undo]
Thanks!