Hi Martin,?
The update isn't firmware or software related, it was simply me reporting on the received audio reports from other stations and my own observations of it's use. Its a great piece of kit especially if running the 817 barefoot.
You can get the compressor from sotabeams as Robert said, and yes they do sell out when in stock. If you buy one you won't regret it.
73
Andy
?
M0RON