Abstract: A movable platform includes a housing having a first side and a second side opposite the first side, the first side having a first port and the second side having a second port. The first and second ports are configured to receive a drive line that has at least one flat side in a twist resistant manner. The movable platform also includes a drive mechanism disposed between the first port and the second port for engaging the drive line, and a support member disposed adjacent to the drive mechanism for guiding the drive line toward or away from the drive mechanism. The movable platform further includes a motor operatively connected to the drive mechanism. The motor provides power to the drive mechanism and causes the drive mechanism to rotate.