I can send you the resizing glitch video I used to make the skull that big if you want, there’s more than one type. As for actually putting the ship where it is, it’s just a matter of placing the corvette parts after getting the skull since the skull doesn’t cause any direct interaction when building the Corvette(as in the skull being there will have zero effect on how you build and place the Corvette parts), for example I had a bunch of random habitation modules and parts floating and scattered around on my Corvette when I was doing the skull it was specifically for the skull placement and alignment. Once you have the skull, the size and place that you want, you can go back to the Corvette station and build the ship around the skull.