Good work. Clearly shows thought was put into the build.
All I can really comment on are that the legs look a bit wide down around the knee. You can make them slimmer, and you would look better. The frown would look better if it didn't stop "flat" with straight edges. Make it taper out. The ears could be better as well as the vocoder. What you want to use for the vocoder is a flat brush that has a half-circle cut. It's called a filbert brush sometimes.
And I understand if it's somewhat terrifying, but you really should paint the hengstler and not leave the cut out brass.
With that said, you are approved!