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Toggle and 3-way Toggle Switches

This is my own design, as far as I can tell. I've seen similar designs that are slower than this, but this one is quick, reliable and not too expensive. It's a keeper.

The oscillating platform is the timer for the on/off mechanism. The (up and down) piston platform serves as a pulse limiter for the pedestal switch. That is how I was able to get around the 3 second minimum of the pedestal switch. The OR gate underneath the oscillating platform makes sure the platform can't stop moving if both laser beams are unbroken - it can only stop if one of the beams is broken.

The timing of the pulse limiter is important. It has to be within a tolerance or it won't work. Also, it's important to push the two big vertical lasers out to the edges of their blocks so they time up properly with the oscillating platform.
The second room has the same toggle switch design, but it has two pedestal switches with an OR gate between them, making it a 3-way switch. You can turn the light bridge on or off from both switches