Part 3 shows the reassembly of the autotransformer, including installing a new front panel with all new components.
The new front panel is cut on the CNC machine, and it features voltmeters, ammeters, a tap change switch, two neon indicators and an on/off toggle switch.
The video for this is available in two versions.
The video above is an abbreviated version. A longer 1 hour version is also available, which contains a lot more detail.
The content covered is the same, so if you have watched the long version, there is little point in watching the short one, as it covers the same thing.