Hey guys,
Thanks you for all your comments and support, those are greatly appreciated !
Thank you very much Guy, I let you know once I got it !

)
Some news now...
I will show you the process of how I built a dome with one piece of styrene. Unfortunatly, it was not perfect so I will have to go with another way (3D printing ? Probably).
Here some stuff which will detail the main hangar bay :
I've read somewhere that the kind of rails of the main hangar bay were from a loco kit. Actually those are every black pvc half round and H rods with half styrene disks. It can be seen on a pic of Fulmer building the hangar and it's easy to notice that those pieces are not evenly cut and glued (there are a ton to build, they could have cast the parts ! I will :$).
Ive also worked on the underside of the bridge which is almost done. I did some cool find !
I worked on the X array, it's also almost done, some minor details to add :
Thanks for looking !