The NBK knock of of Gravity Builder, also known as the Transformers character Devastator, is very impressive, especially for the cost of admission, but he isn't perfect. There are a couple of relatively minor details that should have been tweaked to make this set and this combiner truly outstanding. I also show him compared to Power of the Primes Abominus and Combiner Wars Devastator.
https://youtu.be/wKIwAGVlB7I