Board Thread:General Discussion/@comment-195.59.114.72-20171016130716/@comment-32243105-20171016161437

Hi user,

In the case of Shield upgrade all ships can take it once as a modification as it is not listed as 'Unique'. It is only when an upgrade is listed as 'Unique' that you can only use it once in your list. You can indeed use Shield Generator even on ships that don't have any shields previously.

The other key word to look for is 'Limited' which restrict them to being used more than once per ship. For Modifications 'Smuggling Compartment is 'Limited' meaning one ship cannot equip it twice. Shield upgrade isn't 'Limited but the wording of cards like Royal Guard TIE prevents you having 2 of the same upgrade for now menaing you cannot put two Shield Upgrades on your Tie Interceptor.