Working on a new transforming Kre-O Optimus Prime. This time, I'm building on the bases of the transforming Kre-O Bumblebee I did a few months ago. I first started swapping all the yellow parts on Bumblebee to make him progressively look like Optimus Prime, then I rebuilt the legs and the hinge mechanism holding the backpack and modified the chest a bit.
I plan on trying something new with backpack and the chest: basically turn a portion of the backpack into the chest (I want to move the windshield halves to the front to make Prime's iconic chest windows). The rest of the transformation would basically stay the same.
The original:
I'll post alt mode pictures for Optimus tomorrow.