I could start it and others would add accordingly as I bet there are plenty who know more about this than I. The previous question on the other thread didn't get a lot of love, but then again, likely the wrong thread.
The history of Mecha/Megazord designs was what I had in mind. The inspiration for them, the final approval, unused sketches should they exist, unused ideas which ultimately fell through. I already touched on this with the "Super Sentai General Questions" thread, but this might be too specific for that. Basically, it follows the "Why do they look like that?" bit. For example: Giga Bitus/Zenith Carrierzord looks like Jaguar Vulcan. Why use a football player for Tackle Boy? Why does Daizyujin/(Dino) Megazord have what might be considered "devil horns"? Why did it take until Kakuranger to get two five-piece "mecha"? Various thoughts of this nature. Any problems?
I would like to contribute to the plea for collection photographers. You said you needed a link to the pictures one takes, please explain this a little further so I can understand completely. Sorry for any inconvinence.