This is an upgrade and add on to my 2015 OP-04 Model. Some of the small tweaks needed and fan suggestions were added to the base design as well a slew of accessories. Here is my latest fully transforming G1 Optimus Prime (OP-05). You can buy instructions for this model and other popular models from our WEBSITE
You can watch the video to see the full transformation on Youtube for more insight or check out my Flickr photostream For this and other cool Lego MOCs.