FIG. 1 is a front view of a control aid housing.
FIG. 2 is a rear view thereof.
FIG. 3 is an isometric view thereof.
FIG. 4 is a left side view thereof.
FIG. 5 is a right side view thereof.
FIG. 6 is a bottom view thereof; and,
FIG. 7 is a top view thereof.
The broken lines in the drawings depict portions of the control aid housing that form no part of the claimed design. The dash-dot-dash broken lines define the bounds of the claimed design and form no part thereof. The stipple shading in the drawings is used to show surface contour. The control aid housing is shown broken away in FIGS. 1, 2, 4, and 5 of the drawings to indicate indeterminate length; the appearance of the control aid housing between the break lines forms no part of the claimed design.