Looks like you're having a good go at this one. Another site for some goodies:
http://www.tank-modellbau.de/keng5/Trac ... pfwagen-IV. Do check out the PzIII section, since some of the parts are interchangeable.
RE: the cupola, I've done the metal cupola and the plastic (PzIII and PzIV). I would save the cash and stay with the plastic. The metal doesn't correct any of the errors of the plastic and the plastic is easier to work with.
As far as what parts are missing and where they go, take a look at my build (already referenced earlier). I've made a lot of the mods you're making and tried to provide a lot of detail to make it easy to replicate what I did. For example, the grab handle I redid with brass wire and gave the wire diameter. Rather than trying to read it all, just skim to find pictures of what you're working on and read that section. I also tried to list my parts sources (vendors) as I used them.
For the wiring, Taigen and HL like to use the positive as the common line.
1) this controls the track recoil and cannon sound. I don't use it because I hate the track recoil. Gun will fire without it.
2) switch...you're correct
3) don't see a #3
4) powers the gun, elevation, and red warning light. Mine didn't use a plug. It was a set of wires that connected the 8-pin plug to the gun and the elevation motor. Maybe the newer elevation motors have a "jumper" plug in them.
5) Goes to either the elevation motor or to the red warning LED. If the LED, there should be a red wire from the LED to the switch to complete the circuit.
BTW, if you install a working coax machine gun, you'll need to add wires from the 8-pin plug to the coax gun. It will be the same connection points as the hull MG.
RE: paint and cupola gun, the Schumo cupola MG 34 was designed for the ring mount on the Tiger and Panther tanks. The PzIII and PzIV didn't have ring mounts. They mounted in a hard bracket facing forward. Mato has a crude one, but it is better suited and more accurate for these tanks than the Schumo gun.
www.modellbaugasse.de makes a very detailed cupola MG 34 with mount for the PzIII and PzIV. I have it, but didn't use it. It's very detailed, but delicate. It would work well for a shelf queen, but not a tank I drive through the front bushes.
Also, if you're doing a 1st SS PzDiv PzIV Ausf F2, you might want to check the photos. As I recall that division was on the Eastern Front and they generally did mount the MGs on the cupola on the Eastern Front. That was done to counter the air threat. The Soviets didn't present much of an air threat. Most of those cupola mounts were found on the Western Front where one of the primary means of defeating German armor was with air power.
As for the antenna, the antenna will work but the base is wrong for a PzIV F2. It would work for the Ausf H or J when it was moved to the back corner of the tank. That said, you could drill a small hole into the plastic base on the side of the tank and mount a shortened version of the wire antenna that came with the tank. That would be more accurate.
Sorry I'm late jumping in this one...just saw the thread.
