Estes Solar Launch Controller #FS-10 Part 3

This unit is like a flashlight - it seems too light until you add the batteries.
The battery weight makes it feel hefty and stronger.

One thing I didn't like - 
The batteries fit very tight in the housing. So tight that the bottom plastic "wall" bends a bit under all the pressure.

Of course I tried it out!

With the clips connected and the key in place, the continuity bulb lit brightly.

I pressed the recessed launch button (recessed was looked on as another safety feature) and the light went out. The power was directed to the clips.

For all the "I remember that" rocketeers, here's the two interior pages of the instructions.

You did have to screw the contact pieces into the body halves, an easy assembly. The micro clips were pre-soldered onto the 15 foot long gray wire leads.

As specified:
"Uses only Estes Solar Igniters (NWI-2)"
You have to wonder, how many didn't get ignition with this controller if the older NWI-1 coated wire igniters were used.
TRIVIA: The NWI-1 igniters were the only ones included with the engines at that time.
You had to buy the Solar Igniters separately! 
In 1972 you could buy 6 igniters for 30 cents. Now they are around $1.00 apiece!