Let’s replace the rear master cup.
To give you an idea of how dirty it is… it looks like this.
It’s best to work quickly with minimal water.
If you pay attention to the brush as well, I think efficiency will improve quite a bit.
When using a new pad with a used disk, it’s better to chamfer it to match the current disk condition.
It only moves by the pin width, but I think it’s fine to check how much it’s worn before proceeding.
