When the new Ork codex was released, I knew I wanted to make a vehicle-heavy army. The perfect HQ to lead this rabble is a Kustom Force Field Big Mek(their spelling). I didn’t have access to the official model, and didn’t like it much anyway, so I got to scratchbuilding my own. The only HQ unit I had was an Assault on Black Reach Warboss, and I wanted my Big Mek to be BIG. I cut off all the “Warboss” looking gear, and made a few bionic arms, a leg, power claw spanna, KFF generator, and chose my favorite head from the AoBR Nobs.
The hardest part was deciding how to make the arms. I wanted all the working parts showing, and wanted the hands to look detailed enough that they would be able to handle tools. I looked through all my styrene tubes, and decided to make them a set of hydraulics. He took a few hours to finish, and looking back there are a few things I would change if I re-made him. But I think he turned out quite well.
This is the first model I made using these types of arms, the bionic arm tutorial page shows how to make these.