So, in my continuing quest for all things G1 comic, I bought Fanshobbys Powerbaser with the plan to build an add-on kit to help him better match the G1 comic model of Powermaster Optimus Prime. I felt the main design elements he needed were the crotch, thigh caps and double shoulder stacks. The ankle parts were because I really didn't like the pistons. It's built from cut-up Lego and styrene, and involves no modification of the base figure save removing the skirts. It also enables the waist swivel to properly work, unlike the original skirts. It is fully transformable with no parts-forming.