Once again, props to OMTonyG for finding this glide. This is the second time he's picked up the slack on Master Levels routing.

Pretty sure the guided glide here is similar to the Suburbs one, except you have a wall on your right side instead of your left. This means that you have to start running at the gap with both a certain look angle AND a certain distance from the gap, though exactly how precise the distance has to be is unknown. Also, this glide is south-directed while the lv16 glide is west-directed, but I'm not quite sure if/how that affects guided glides.