I personally wouldn't go with a full bio-mechanical sleeve. It would look a bit too weird. I currently only have one tattoo, which is a 9/11 memorial. In the next year or so I'm going to go back and have flight 93 and the pentagon added into the tattoo. As currently it is only the towers with an eagle above it. (If anyone would like to let me know and I'll upload it to this post)

Anyways back on topic. As I said, I personally wouldn't get it, however the decision lies with you at the end. And if you're unsure about getting it, simply don't because if you do, you'll probably regret.