What now, well there is still a generator to scratch built and then the control vehicle for the launch - this is a Trumpeter sd.Kfz. 7 with a resin add on from Azimut, followed by a control/headquarters trailer and then various other vehicles and trailers to carry troops and assist with the launch.
I am going to start with the control vehicle.
Feuerleitpanzerfahrzeug für V-2 Raketen auf Zugkraftwagen 8-ton
Zugkraftwagen 8t - Sonder Kraftfahrzeug – Special Motor vehicle (Sd.Kfz.7/3) half-tracked prime-mover, powered by the Maybach HL62TUK, was converted to control post vehicles for rocket launching units. The rear of the Feuerleitpanzer was mounted with an armoured superstructure to house the guidance and radio equipment and to protect the crew of 3 men from the blast and explosion. The vehicle also sometimes towed the mobile firing platform used to launch the rocket (Abschussplattform).
Here is the engine under construction.