It's been a while, but I think I can solve the puzzle now. This Tausi is a Sechelleptus lambertoni. He has also surprised me very much over the years because he can change the color:
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These are both Sechelleptus lambertoni. I got both as red-brown Tausis. And then one was suddenly green after molting. The colors in the photo are pretty good.
They are approx. 23 cm long and have 77 or 79 segments. They are also very active and like to climb long at the top of the gauze. Unfortunately I have no offspring.
Your millipedes are awesome! Has the male's color changed since you posted this photo?