Thanks for all the feedback/suggestions chaps.
If I do try a Far East LPS it may well be the Zero-Zone as it certainly appeared the most robust in my search and confirmed as such on the CA thread. But I am wavering, as like Charles my Naim gear is on a separate spur with any SMPSs on the main house ring, so there may be little benefit.
But my main aim in all this, apart from acheiving good SQ, is to also try and keep things simple, which is what led me to the microRendu in the first place - replacing a SB Touch and Regen with one small box. Lots of dangly bits in the USB chain is not really where I want to go. So although as Mr U has found there are gains to be had, I just cant see myself going down that hole. Thanks, but he USB Chain Topic thread scared the hell out of me.
I think I will be content for the moment to enjoy the improvments the 1.4 board has brought, knowing that should the itch strike, there are areas to explore.
Now, if Uptone made their USB adapter with a micro plug for my Hugo, I might be persuaded to have a go.
I bought the Zerozone SUPER-PSU 30VA DC9V 2.7A from the Far East seller sn... (he answered my emails the fastest!)
I have been trying it out on the Ultracap LPS-1 powering the new ISO Regen in my setup! It works well, but it has to have a short DC cable, IMO. I find a 1 ft silver plated 18 awg copper of the wire I usually use to be okay. The same cable at double that length - NO.
PS - I do not have a dedicated spur for audio, so if you have one - YMMV when trying to sub the Mean Well for a LPS!