First off, be super gentle with the electronic parts. I started by carefully heating the neck hole of the headsculpt with a hairdryer for about 30 seconds. This makes it a bit more pliable and easier to work with. Then, I used a tiny bit of lubricant around the neck peg on the Phicen body to help the headsculpt slide on smoothly without putting too much pressure on the electronics.Next, align the headsculpt with the neck peg and gently press down. I found that rocking it slightly back and forth helped to ease it on without forcing anything. If you feel any resistance, stop and reassess, because you definitely don’t want to snap any wires or damage the internal components.Once it's on, check the movement and make sure everything is functioning properly. If something seems off, you might need to remove the headsculpt and try again, but heating it up and using lubricant should minimize any issues.