I just tested three older modded freighters that I though would crash the game. However, all three sank fine. But none of them appeared to suffer any damage.
I took some screen shots of two of them - the Kyle and Heavy Merchant. I didn't get a shot of the third one, the Belize. (The Belize and Kyle are a long way back in the 'Ship Requests' thread, and I didn't post the Heavy Merchant there). I was going to release these ships, but now I don't know.
I might have the zones file from NYGM installed - I don't remember. Any thoughts?
Here's some pictures. I only took a few.
Heavy Merchant:
Kyle Coastal Merchant:
The ships in the background of this picture are (Left to Right):
- USS Pyro (old model which has been replaced and is kept only for nostalgia

)
- Lake Ship (Barely Visible behind USS Pyro)
- Rose Castle Ore Carrier
- E.G. Seuber Tanker
- "Generic Tanker" (To be almost completely rebuilt).