So, as someone who actually wears a prosthetic leg, I've just got a slight comment. The positioning of the hinge seems...off. It should be more near the center of the bottom of the cup. As it looks, it seems off-center, like it's positioned near the front of the cup. I know this might just be a no experience, not aware of prosthetics as much thing, but I thought I'd make the comment in case you wanted to know.
Thanks for having a kick-ass woman with a prosthetic in your comic at all. I love the way she talked to Sydney about it.
That makes sense. I guess this design would make her leg slip backward while she tips forward. Obviously the shaft of the prosthetic would need to be under the bone for it to work right.
I googled a bunch of prosthetic leg images, and there's obviously not one standard design. I'll admit I probably got a little enamored by some of the 3D concept models, some of which may not have been the most well advised designs even if they looked cool.
Oh that's not a joint, there's a fitted cup that her leg goes into, and when I was drawing it I thought it'd be interesting if various prosthetics could be affixed to that with a sculpted plate and some screws.