Hybrid Finger

Please go and look at my gofundme.com campaign so I can keep working on this.
http://www.gofundme.com/prosthetic-hand

I'm working on a hybrid finger for Hollies Hand. This contains a finger connected with strong pin joints enclosed in an elastic 'skin'. The idea being that the skin acts as the returning force on the finger, allowing a single tendon to move the finger. Because the 'bones' are connected by pin joints they are tougher than if the entire design was made from a flexible material