Well, I am sorry to report that my 481THz lightbeam experiment was a total failure.
Although I could detect my QRSS3 signal strongly across the house bouncing off the windmill I was unable to detect any sign of the signal at my remote site. I had problems with aiming which did not help, but I was not expecting the total exhaustion this test brought on. In days gone by this would have been easy, but even soldering a headphone jack tired me. Doing the actual test left me totally "done in". I really should repeat the test with better aiming, but I am not ready in my body.
If one thing this has taught me it is that I am still too feeble for field work. It was a great disappointment, but there will be other opportunities.
In past years I loved doing this sort of experiment. Sadly, my body is telling me, "not yet".