Upgrading done. They were right on time. Took less than 5 mins.
In terms of sound, I haven't tried NOS before so can't compare with previous version. Switched to NOS for the first time and I prefer it over 8x OS definitely. I am a sucker for warmer sound signatures so makes sense. Soundstage seems wider too, not sure if placebo if there's a reason for that. I will definitely be keeping NOS, just put the box cover back on, hope never have to open it again haha.
Oh and I did end up cutting the connection off as suggested by AGD for Amanero. Didn't change anything functionality wise so I guess I did it right phew.
Onto listening more, perhaps getting new headphones as well, Utopia may be?