Hi Mark,
all looks great. Here is a picture of my "radio", mounted closed to the LNB.
It is a good weather unit. Don't care about the plastic cup which mechanical protects the helix. It was filled with beer once.
Your PSU seems to be a little bit oversized .
Before portable operation you often have to adjust the dish, I recommend to use the transponders basic noise as an indicator.
It can be seen cearly using 2 MHz bandwith. The software is SDR# with RTL-Stick V4. The rising of the noise while optimizing the dish is independent from any signal and frequency. Behind my dish, there is a little board to carry a small laptop. Moving the tripod and the dish and seeing the maximum noise at the display takes some seconds only. Especially outside of the motor home it seems to be useful using the RTL-Stick, a little battery with a current limiter, a bias tee and a laptop, independent from the radio and the Computer inside. I call it the "setup kit".
In the last days I made some bad experiences with heavy wind. The radio acts as like a sail. More stability is needed.
What is about a PTT-Circuit in your setup?
Regards
73
Andreas