NIghtfall Collector and weaponsmith items and mods

I was wondering with collector items in Nightfall if you can change the inscription?
Alos some weaponsmith items come with none (like from command post) can you add some to them?

yes you can. otherwise there'd be no point in the empty inscription spot.

the collector ones are all inscribable because it says Inscription:None.

What about the ones that do come with an inscription already....can i change it?

if it has an actual inscription, then yes you can change it (except for the one green item that lists an inscription)