One of those "when I have the time, in another life" projects...
Wait, do those 'muscles' contract when a current is passed through them?!
You must find that very interesting Dan, I'm assuming that the torque they exert is going to be on the low side...
I have a set of lock wire aviation pliers which have a pull spinner incorporated into them. If you want to give them a try I can bring them in to the open house
I haven't got any nylon at the moment, nor do i have the wire to wrap etc.