I started this project last year, or even before, cant remember... Anyway it was inspired by a similar figure by TFMaster, he was doing a proper Ultra Magnus by mixing pieces from Overload and Energon Magnus, but he once said it was extremely dificult to do it and not really worth to try But i had to try it for myself anyway , got a cheap Overload (for like $15 IIRC, and thats cheap around here), and started working. Arms were done with RiD Grimlock leg and joints, they actually fit perfectly on the shoulder and thanks to that, the transformation is pretty much unaffected. for the elbows, used a combo of joints from Energon Inferno & Bendy Prime (well KOs of these figures). Hands are KO Alt Wheeljack The Knees were kinda simple, i only had to cut and get the proper joint. By now there must be lots of similar joints from the different lines, but what i used was a Wing joint from a Gundam Wing KO figure. The legs were done by cutting the existing piece and adding Armada smokescreen instead, again perfect size for both joint & balls Finally, for the head, right now i casted an Omega Prime face, glued to place and im doing the new sculpt based on the real Sentinel Maximus. The neck joint is an elbow from RiD Prowl What lefts to do? first of all, i need to find the left shoulder piece (on where the turret attaches), i cant find it anywhere! (Note: try to use a double ziplog bag just in case you stop working on something for over a year...), i might need to use one from a Minicon Menasor i never finished... Obviously need to finish the whole head (and im still wondering if im gonna sculpt Apelinq small face...) and of course, lots of details!