Originally Posted by Squidward
I do have a crank as a backup, but there's no way I'd attempt to switch from on machine to another.
I guess if you had to switch machines, you would have to hold the the string. I would suggest using floating clamps, but if you were using floating clamps to begin with, you probably don't have a electronic machine. The alternative is to use staring clamps. Though you would need to tension inorder for them to hold the tension.
The best thing to do is wait for the power to come back or have a UPS like Tray999 suggested.