Pretty good, I love when you make fan-fic stuff like this Fritz.
I think the only thing I would not have done is connect the hose to the front of the mask. Although it probably does make logistical sense for it to be there. I would have probably connected it to the back, just because I love the helmet on the Scout Troopers so much.
The whole figure is great though, I like how you didn't add any blue tones to it, which to me seem unlikely, especially in the Imperial era.
And I didn't forget the dead Mon Cal at his feet... hee hee
I would wonder if you'd be interested in making some sort of underwater one man vehicle for him, using something like this as a base for it -