Testing systems and methods are operable to perform diagnostic testing of a remote electronic device under test. A first installation portion is provided on the third skeleton frame at a position closer to the second skeleton frame side than a center portion of the third skeleton frame. A chain, cable, or hook member attaches the second portion to the control arm. The real-time stereo rectification system makes it possible to acquire rectified images in real-time without using a separate computer system or a software program. A method for attaching a stimulation device of the invention to a wall of a gastrointestinal tract is also included.