Finally finished this beast and took time to document it on artstation: https://www.artstation.com/artwork/o2eDb4
I did document some of the progress also here: Deconstructor hard surface modelling WIP
Here are some screenshots from different angles:
And some videos. First, Cycles render showcasing the model:
Second, in game view of the model (the game is written in unity):
And a playlist showing the model in various stages: https://www.youtube.com/playlist?list=PL-Ehx1lVtjzywi7Ud59F08y6YzhlKml7-