Project Horizons concept sketch #1 [spoilers]

A sketch a made as part of a concept for an animation for Project Horizons I may or may not actually ever finish. I tried figuring out how Blackjack's robotic hands would look and work, as they are built into her hooves, which isn't taken into account in most drawings. In addition, I want to have the animation, which is going to be Music video-ish thing, include one or multiple ponies playing instruments. My plan is P-21 singing and playing guitar, Blackjack playing a banjo or something, and I have no idea what I'm going to do for everypony else.

As always, MLP: FiM belongs to Lauren Faust and Hasbro.