How to make item abilities (e.g. lower ability cost) stack

[kebeld]

Hi Nexians,

 

is there a way to make the bonuses of the same item ability stack? That is, to make the 10% lower ability cost from master crafting for example stack with itself.

So that I don't have to use 10% and 7,5% because I can use 10% twice.

 

If not, is there a way to use the "Stat_Cost_Modifier" in a way that it shows the reduction in %? I seem to have been able to use the stat on an item and reduce the cost. But the stat displayed on the item is "0 Cost Modifier", which is extremely ugly...

 

Any ideas?

Thanks in advance