Borderlands 2 : Hand Painted UVs

My first attempt at hand drawn UVs for a prop. I was challenged with finding a reference and converting a concept into a 3D prop. After a little bit of searching, I've come across a concept piece for Krieg's Buzz Saw from Borderlands 2. It was extremely difficult and I would love feedback on how I can improve my project further. The picture goes by reference, in game model, topology, and the UV's.