So basically what I have noticed is when you have a stack of items and for example when you have a joint that is on 30 quality and you put in the stack of joints that are higher quality it will reset quality on that joint that was 30 quality to the joints that are higher quality..
idk if this makes sense try this
give your self 1 joint degrade it to less then 100 give your self more joints and put that joint will less quality in the stack and try to separate it and you will see what i mean
So basically what I have noticed is when you have a stack of items and for example when you have a joint that is on 30 quality and you put in the stack of joints that are higher quality it will reset quality on that joint that was 30 quality to the joints that are higher quality.. idk if this makes sense try this
give your self 1 joint degrade it to less then 100 give your self more joints and put that joint will less quality in the stack and try to separate it and you will see what i mean