However I didn't really notice much difference in Rx or Tx performance so I am not sure if it is really necessary. Probably doesn't do any harm though.
I wanted to mount my Pluto in close proximity to the RPi 4 and two 3W power amplifiers (one for 146, and the other for 437) so I removed the plastic case and built a square tinplate box around it. I soldered up the bottom and side seams and have some fingering around the lid.
No idea about any performance improvement, but it has worked flawlessly in that environment.
I have noticed that the Pluto is sensitive to more than 5 volts (think I read that somewhere recently / Wiki?) and when switching to Langstone it will just lock up and sit there saying loading....everything seems happy around the 4.9-5.0 mark with DC fed directly into the +5/0V GPIO pins from a 3A buck convertor.
Clip-on ferrites on their way for the short Anker (quality I hope) USB lead.
The diagram is here https://wiki.analog.com/_media/universi ... c_revb.pdf showing low side drivers as might be expected. The LEDs on the PCB were tried with some 5mm blue conventional ones across and as both still lit up fine I went with simple wire extensions to my front panel. They were easy enough to solder to with a conventional iron, unlike the RPi which was a real job!