This is the 'Axial Instrument Bay' which is mounted at the bottom of the telesope interior.
Just visible are the wire handrails I had to use to replace the tiny paper ones with.
At the moment, this part of the model is upside down, it will get flipped over when it is attached to the telescope.
This view gives some idea of how fiddly this model is. You can just see the thin cardboard strengthening strips at the top and sides of the model.