Ok...First off let me tell you guys that this figure is really FUCKING AWESOME! DAMN IF IT IS NOT SHOCKWAVE HIMSELF! OF course not better though than the absolute winner MP-29 which is the perfect figure IMHO. Aye boys, after many tries and fails this is what I got in this awesome figure. No much to tell here...All you got to do is to rip your Cybertron Downshift apart and take his legs out. You will know where to cut, which is about the first panel line above the knee area. Cut it nicely and sand the piece down accordingly. Then you gotta have to cut the mushroom pegs out of Shockwave's legs, sand down the whole square area and glue the downshift's knees at it. The mushroom pegs are pretty much compatible and no other works will be necessary. Just make sure you have an absolute strong glue.