Despite the amount of time you had to spent on this up to the point you can't enjoy it, I'm telling you: This picture is just wonderful! The shading is right, The colors are great. The Antros are just wonderfully made. Also, these mechanical wings reminds me some Protoss architecture (Starcraft) or Chozo maybe (Metroid) if I wouldn't say Dwarven (The Elder Scroll)... Anyway, I just LOVE these. But there's a minor detail you might have forgotten: There are no Cutie Marks... If there were the Cutie Marks, that would have been perfect.
Ok, as hot as that is, I'm more impressed by how well you've got the human body structure combined with the ponies. I have found very few people who actually pull it off successfully. Keep up the good work.
I don't know why I like this. It's random, and I hate anthros, but this is the most beautiful drawing I have seen all day. The wings are so intricate and peautiful, and everything is just perfect. Also, not sure what's going on in this picture, but it looks like it's the future and anthro Dash and Twilight are about to go flying together.