I recently purchased an RTS G2 Optimus Prime with plans to later buy the MakeToys Battle Tanker. I have since then seen a pic of Optimus from the back with the add ons attached. Not the full on heavy armorment mind you just the parts that make for a bulkier more badass looking Optimus. I noticed in this pic anyway that the back of Optimus' forearms aren't covered the way the front & sides are. In other words the original Hasbro toys forearms can be seen from the back, making it look like it is wearing the add ons as opposed to them being a part of him. My question is, is this the it actually is or was the pic I was looking at just show how it attached or somthing. Also what all comes with this set and is it worth the $100 in your opinion. Thanks in advance any help is good.