PBR used only for two objects, all objects are unwrapped and labelled, the labelling is a lil bit quirky but understandable. .blend file also included. contact for any help with it.
BLEND (Blender, filesize: 52.6 MB), OBJ (OBJ, filesize: 57.5 MB), FBX (Autodesk FBX, filesize: 18.4 MB), STL (Stereolithography, filesize: 38.1 MB)