Having just got for really cheap some spare parts of the Deluxe Optimus Prime, I decided to make my own Ultra Magbus. So he uses the joints, hands and head from Optimus Prime, wheels from a spare Megatron and pieces of Lego from an old box. He's bigger than a classic "big" Kre-O and i'm not sure i'm gonna keep him. I'm considering using the pieces to make a G1 Optimus Prime instead. What do you think ?