My initial thought was to unfasten the hue control from the chassis bracket and simply let the cable drop down to the bottom of the cabinet and fasten it to the inside of the cabinet. No holes on the side of the cabinet!! The cable looks to be about 15 inches long. There is sufficient room for the hand to reach the control if it’s long enough. I think I’d still need a mirror and we would have to unfasten the mount every time we pull the chassis.
I decided not to drill a hole in the pencil box because it would alter the physical appearance. The control could easily be replaced to its original position for purest collectors.
We placed the restored cabinet in the room anticipating the gymnastics of adjusting the hue control. :-)
