On my side I'd like to see the resuts with an alternative maj and min 3rd's...

C, E, G, B, D, F#, A...etc...

As you probably spotted too, I think those extra fret markers at 4, 8, 12, 16, 20 & 24 are convenient for a "one marker down, one string across" relationship with the all (major) thirds tuning?

e.g.

Ooooo, that's nice. I don't recall watching that one before. Thank you.

I'm aware of his youtube channel, but it's not very active & I've no idea if comments there are seen. I strongly suspected someone here would know, so it seemed like the better place to ask. It worked.

Now charted: Roman Giza 10 - All Major Thirds 10

For any particular reason Alain?

As I was doing Roman's all major 3rd I decided to have a go at what you described. It was not easy to keep track of where I was while charting it out, but I think I have if correct? I've put it in the "Thought Experiments" section.

Alternating Major Minor 3rds 10

I have to say that my first reaction is that I don't think I'd fancy trying to play it? However, each to their own...

It gives triads in open tuning...more or less. Easy chord with one finger playing a barré. On a staff notes are that way too.

I asked someone, not so long ago, if he had some news from Roman. Can't recall who.
He told me that he struggled in Lisbon with the Covid period and went back to Poland. Don't know if it's right.

I found his email address here:
https://www.youtube.com/watch?v=-lPwBjNbFOE

You can try emailing him. He might answer.
stickowestory@gmail.com

kind of reminds me of slide/steel tunings (like C6 without the 6th, maybe the 6th would be useful)