I've made E-123 Omega out of the Thrilling 30 Legends Optimus mold a few times before, but this time I incorporated a bunch of parts made on my 3D printer using models that I made myself in Tinkercad. The head, forearms, hands, part of the torso, and shins are all my own original models, the feet are also 3D printed but someone else made them and I only altered them slightly so I could embed the joints in it. I used some lego and mega construx ball joints for the hip skirts and ankle joints, the rest is hand sculpted with apoxie sculpt.