On tuesday  Rick and I went into the PCAL lab to change the optical layout to assist with the SPI beam splitter characterization.
Everything outside of the TX module was changed.

The Spheres were lowered.
Periscopes were removed.

We are now just using 1 beam. (Inner beam.)
Which now hits a Polarizing Beam Cube before hitting a Beam Splitter that then splits the beam down one arm into an PCAL Power Sensor integration sphere.
The other beam is sent to an HF mirror which send the majority of the beam down to the other PCAL Power Sensor integrating Sphere. Some of the beam power goes through the back of that HR mirror and is ~ 153 uW according to our power meter.