Oh boy! More old crap!
Here's my favorite launcher from my teen years -
The Centuri LIA-77
You can't tell by the picture, but I sanded the band saw cut legs smooth and hit them with brush coats of Deft. On one of the legs is a Centuri decal.
This one is missing the bent metal Centuri blast deflector with micro clips attached. That's an Estes deflector that I found in the box with the launcher.
Here's the underside. The triangular piece of wood held the launch rod stuck through from the other side. The main triangular base piece was cut from 1/8" thick plywood.
With just two of the wing nuts removed, the outside legs would swing into the center for transport in my range box.