You can replace item from even to odd number
round_help_extra4.gh (18.9 KB)
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It works!
Thank you very much, Seghier! 
Now that I have your attention, maybe you could answer this small data question, so I can automate the boxes instead of an index slider:
How do I take the numbers from a list (in this case, where the value equals 1) and input these numbers as index?
It should be so simply, but I can’t for anything in the world understand how to do it. Neither Item Index or Member Index seems to work, but I might be using the wrong.
EDIT: WELL, never mind. It DID work with member index, I was just too slow to understand the output. Thanks again, Seghier, you saved my day
You can use member index and replace items together
and if you have different number use the same method with a little improve
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ARH, well, another thing taught! 
Thank you so much, it’s beginning to make sense!