Hoping to have time to get through this once my current bit of freelance finishes.
For those unfamiliar with these blokes from greek mythology:
Hecatonchires come from the Greek Hecatoncheires which means "hundred handed". They were gigantic and had fifty heads and one hundred arms each of great strength. There were three of them: Briareus also called Aegaeon, Cottus, and Gyges also called Gyes. They were of the same parents as the Titans and the Cyclopes, Uranus and Gaea (the Earth).
I'm doing a bit of a reinterpretation; combining the three into one and reducing the number of arms. I've concepted a rough idea of anatomy and have a rough head sculpt concept.
This could get very messy...