I like the color scheme, although I would probably give it a darker shade of grey and maybe another lighter, contrasting color (I'm thinking something like Jango's Slave 1, but obviously with different colors).
I really like the "Bantha" Skull (or whatever it's called), it looks very sharp.
I don't think I would put a Mando helmet on the wing though. Maybe Boba Fett's "Wheat" symbol or something like that.
The writing on the side and the lightsaber "kill" marks look awesome, I would leave them as is