After three years, a multitude of failed models, and lord knows how many crumpled up pieces of paper, I have finally finished my custom origami optimus prime! As far as I know,
How to make a Papercraft, Origami Bumblebee V2 (requires 1-3 straight cut) - YouTube
Origami Robot (Mecha 7) by Kamitoyz on DeviantArt
How to make a Papercraft, Origami Transformer Bumblebee (requires 1-5 straight cuts) - YouTube
How to make a Transforming AUTOBOT WHEELJACK Origami Transformer - YouTube
How to make a Transforming AUTOBOT COG Origami Transformer - YouTube
Origami TRANSFORMERS : 8 Steps - Instructables
How to Make Origami Robots | Pink Stripey Socks
Origami Starscream (Transformers) by Bertrand Pautremat | Flickr