SMF Construction Process

Just trying to work through some conceptualization issues with
regard to the Space Manufacturing Facility.

Assume we're trying to build a small Torus structure and the
components are being lifted from earth for assembly in orbit.

The torus "tube" is sectioned into many pieces.

I would prefer that all of the mechanical systems, control systems,
furniture, etc all be outfitted on earth to save assembly time in
orbit.

If this is done, then how much will we have to worry about vacuum
exposure in the open sections damaging all of the equipment.

Should each section be pressure tight, then when sections are
joined, the pressure seals between them are cut out, so that the
many sections start to become a whole with the ends always capped.

What if the sections come in lateral halves or quarters, and we
can't pressure seal them off?

Should then, one of the first built structures in orbit be a large
pressurized assembly bay (assembled piecemeal in a painstakingly
slow process to allow for the large open volume required) where the
quarter sections are assembled, the ends sealed, moved out of the
bay and joined to other completed sections.

If the torus facility will have an intergrated waste heat radiation
facility and other central facilites, how will we process radiant
heat that accumulates during the construction process before the
whole torus functions as one system? Will each sectional piece
require a radiator? Do we wrap the whole thing in mylar to reflect
the heat? Do we extend a large mylar sunscreen behind which we
assemble the torus?

I'm just trying to imagine the asembly of a large facility for
thousands of initial workers and how we would step through that
process. Feel free to bring up your concerns and add to the ones
I've raised.