Nitneuc

Hello. After completing the Beast quest (repaired all the effigies, provided militia to Ille Morat, lit the Scarecrow at night, got the confession from both the Beast and her former husband). They were talking about a stealth suit prototype that was hidden somewhere and that they would tell us where to dive to get it, even though nothing appears in the notes. I already checked the sunken Manor at Ille Morat and found some regular loot but not the suit itself. Did I miss something ?

Hello, I'm starting to be at this point in game where I'm getting some interesting stuff (RPG-7, M-24...) but don't necessarily have the spare space in inventory, or use for them atm. Is there a way to store heavy weapons for some days without risking them disappearing ?