I have wanted to try this for a while now. I originally wanted to use the Thor TF crossover figure that looks like a Cobra Rattler, but ended up finding an inexpensive War Machine, and went ahead with putting a Soundwave head on it. I used the construct bot head. I unscrewed all the screws, but the chest is very well stuck together, so I snapped off the old head and used a soldering iron to permanently fuse the construct bot head ball joint to the neck of the body. Unfortunately, the nose cone will not fully fit over the head, so i will have to take it off when I want to transform him to vehicle mode. Why would I want to do that anyways? I like the robot form. I just need to think of some more alterations and possibly a way to add a few of the Cassetticons too. With this peg style, I can actually attach any of the construct Bot heads to this body.