Find the location for the slot by measuring the distance from the top side edge to the center of the shaft, then transfer
that distance to the bottom side using the bottom edge as a reference. Make a small slot to start and enlarge it as needed
for shaft movement.
The control that is mounted to the hinge is clearly shown on the drawings.
When you don't want to wait for the kerosene heater to warm the shop, bundle up and grab some cold aluminum. I thought this
was "sweat equity"?!