@canisin @DMagic In v1.3.1, I was able to click on the Central Station and manually transmit experiment results without a Kerbal similar to a probe core. After a tech upgrade it would transmit automatically which helped with forgetting due to long wait times. I always assumed the intent of this mod was to replicate the Apollo ASEP experiments which were set up, left and transmitted data back to earth after the astronauts return. (The real life Retroreflector is still operational). I lost this feature on my latest play through and assumed I was having a conflict with another mode or with the latest KSP update. Based on the above discussions I guess I'm wondering if this feature was removed? Not my place to tell anyone how to do their business if its a change; it was just a cool immersion feature.