Methods and devices are provided for rotating an end effector on a long, flexible medical device. The interface circuit comprises a clock output circuit that, responding to the level of the clock signal when the control signal changes from the one level to the other level, outputs clocks of the clock signal that are the same in number as bits of the data to the data register. The live plastic hinge allows drop down of either side of the fixture apparatus without de-mounting from the ceiling mount channel. The first packed data has a width in bits that is less than a combined width in bits of eight state data elements ai, bi, ci, di, ei, fi, gi, hi of the SHA2 hash algorithm. The first pass-through port is operable for optically coupling a second respective predetermined one of the plurality of optical fibers to a second segment of the branch cable extending externally from the first optical connection terminal. In further aspects, substrates are removed from the glass sheet at elevated temperatures which can facilitate increases in the production rates of downdraw machines.