I’ve never cared for dual friction discs.
The material they use on the metallic side is what we used to call Velva-touch (don’t gig me on the spelling…that was 1982 when I saw that trade name lol) or something similar to that.
The biggest issue with it is heat. In fact, Ram used to had “paddle” discs. They had a six and three paddle with that lining on them.
Those discs were light and you could shift a fully syncro’d box at 9k.
But, that material doesn’t like heat. I haven’t been to an auto cross since the mid 1980’s and that was only once. I don’t remember how much shifting and other clutch work a lot.
That heat could be an issue. But 72NB says he’s using one and not having issues. So there is that.
Plus, I’m mostly ignorant about autox and I could be totally wrong about how it works. Maybe I should go to another one.