Leader Class Optimus Prime is a superb toy; a not entirely faithful representation of his movie incarnation, but a fantastically detailed and posable toy in his own right. However, comparing him to photos of the real truck it becomes apparent that for whatever reason Hasbro left a few details out. Some of his flame apps are missing, lights aren’t painted, and such. Movie Upgrade Set M4 is a set of upgrade stickers for Leader Class Optimus Prime, filling in a lot of those little (and some not-so-little) details that are missing on the toy. Set Contents I didn’t have an application map for the set, so a few of the stickers took a little identifying; because of this, I’ve done an identification guide for the set. The set consists of: 1 - outside of lower arms 2 - inside of lower legs 3 - sides of truck nose 4 – cab windows 5 – small vertical cab window (right side) 6 – Sleeper cab silver trim (rear) 7 – Sleeper cab silver trim (front) 8 – angled rear lights 9 – round rear lights 10 – round rear lights (rear fenders) 11 – silver details on sleeper cab 12 – door handles (2 on cab, 2 on sleeper cab) 13 – Autobot Symbol 14 – Robot mode “mouth” sticker For the most part, this set is extremely easy to apply; I’ve always found that the best way to apply stickers is with the tip of a scalpel, Xacto knife, or similar. As usual with Reprolabels the stickers are extremely accurately pre-cut, and I had no problem removing them from the sheet.