[Chadworkz]

In applications such as your clutch disks, you need carbon-fiber that has a very small weave pattern (3k to 8k weave). It looks like you have everything from 500 weave to 6k weave in your scrap kit, so if you need to make new clutch disks, use the scraps with the smallest weave pattern.

The thickness is one thing, but it's the weave and the direction of the fabric that make the biggest difference. 1.35mm 500 weave uni-directional CF won't last long as clutch disks, but 1.35mm 6k weave bi-directional will last forever almost.