Superconductor technology and Batcher banyan switching technology are combined and implemented as a practical component in a single cryo-MCM substrate containing a plurality of superconductor chips arranged in a plurality of rows and columns. The marker is magnetically secured to a base in such a way that a golfer can quickly and easily detach it to mark the position of a golf ball, and as easily re-attach it when the time comes to play. The miter assembly includes a resilient biasing member having an engaging stop corresponding to the detents, a releasing rod rotatably mounted in the turntable, and an eccentric rotator having an eccentric portion and attached to the releasing rod corresponding to the resilient biasing member.