When powering a piston that is faced upwards and pushing a redstone block, it stays extracted!
Video: http://youtu.be/0ipWqV35CK4
When powering a piston that is faced upwards and pushing a redstone block, it stays extracted!
Video: http://youtu.be/0ipWqV35CK4
Unable to see video, though if it is about a piston pushing a redstone block upwards, that is intended.