Hello
The purpose is to have on up and one down button cycle trigging 0 21 41 61 81 with dedicated led for each steps right ?
Maybe a script(runsection + .NGR) will be better strategy, especially to retrigg/update the "opposit" button value to match actual CC value
Otherwise you push button 1 few time (let say 2, CC val=61) but button 2 stay at 0, and if you push it once you send 21...
Best
Zam