[Oblarg]

An interesting observation, relevant to many more varieties of climbers:

Consider a robot positioned on the batter at the base of the tower, which has a mechanism that reaches up to grab the rung.

The batter is, according to the game manual, 6'' tall and 4' deep.

This means that the angle between the batter and the ground is arctan(.5/4).

Accordingly, the angle between the face of the tower and the plane of the robot's frame perimeter, as defined in this rule clarification, is also arctan(.5/4).

The rung is 5'10'' above the top of the batter. A simple calculation:

5'10'' * sin(arctan(.5/4)) = ~8.7''

So, were the frame perimeter flush against the face of the tower, the face of the tower would be 8.7'' outside of the frame perimeter at the height of the rung.

Adding in reasonable bumper thickness, we end up rather close to the 15'' limit. So, if you have a climber that follows the face of the tower up to grab the rung (as we are planning to do), you are safe within this new ruling, but only just. Be cautious of this.