Staying with the GR3 assembly begins on the main construction unique to this model, the Pegasus engine.
Firstly the linkages for the swivelling nozzles
This will allow the nozzles to move in synchronicity
once laid out in the main chamber
The two halves are glued together.
Then the accessories are built up
This control box
Then this part
Mount atop the accessory pack
as is what I presume is a breather of sorts
and some more valves
Presumably in two parts for moulding reasons
Finally the outlets are capped to allow fitting of the nozzles when the time comes.