[@BenG85] a quick nudge, as you expressed interest in the previous thread. 

[@Expendable]

Well for an eye there's not really another option at present. For an arm it depends on the person, but I assume you know what you're thinking of for your character better than I would. 

I'm going to make some write ups for more tech and science that has been formally established. For the purposes of your own writing, the rule of thumb is basically as long as it doesn't directly contradict something that's already been said, you can probably do it. I'll say something if you do something that's too far out there, but I'm hoping to see creativity, so I'll endeavor to make most things work, if you're willing to work with me.