What Should Be Added or Changed?

When adding materials to a repair kit, I would like higher graded materials to be more effective. Instead of an SSS rank diamond adding exactly 1 repair worth of material, maybe it adds 1.5.

Why Should This Be Done?

It makes sense that higher quality materials can do a better repair job. This would also make the material grading system more useful, especially for more expensive materials like tyrian.

Seems this is already handled correctly. The durability of the repair material is used to determine the repair amount, and it already considers the grade.