@kenbarbi, @zoltan, @Syed
Here is the result of a hopefully “third world” type of shield placed loosely over the LNB mounting, using a tin can that formerly housed 425 g of kidney beans. The can originally measured approximately 7.7cm in diameter x 11 cm tall. We had to cut approximately 0.2 cm from the bottom to remove the floor of the can. We slotted the sides 1.8 cm wide by 8 cm deep to accommodate the LNB mounting hardware, and used the resulting straps to stabilize the shield, taking advantage of loops in the mounting clamp. Any insects, small nuts, or water will pass right through. This improved the SNR by approximately 2dB, and put the status in a credible relationship. This unit is outdoors in the weather, although so far, I have seen no weather-related deviations in the operation of the DC-measured results. There is approximately 20 feet of RG-6Q between the DC and the LNB. The environment is very rich in 2.4 and 5.8 Ghz WiFi, which I believe is a large part of the SNR issue here.