I own this figure and was wondering if anyone could help me with a simple idea for customising. I'm very new to customising, but I'd like to do something with this figure because I want to use it as my main Megatron.

The over all aesthetics of the figure I find serviceable/fine as is, but I want to do something about the head sculpt, as it's too stylised for my taste.

Any "easy to do" recommendations in terms of altering or replacing the head?

Thanks to anyone who takes the time to help, I appreciate it.