Nightfall Shield

[Gold of Good Luck]

"Any shield bought/dropped in Prophecies or Factions cannot be modified with a shield handle"

In Nightfall:
In Command Post/Marga Coast, you can buy a shield for 5 Platinums, 40 iron ingots, 6 wood planks.
Daedal Shield(Motivation)
Shield of the Lion(Strength)
Adamantine Shield(Tactics)
Heraldic Shield(Command)

The shields have -5(20%) and +30HP.

Can you make a Daedal Shield of Fortitude?(or of Anything)
-5(20%)
+30HP
+30HP

Note: it is a Nightfall shield.

Can someone test this?

[Karuro]

No, you cannot get a double +30 on that shield.
The +30 you got from crafting already is the Fortitude mod, just as the -5/20% is it's inscription. You just cannot salvage them off/replace them.