I've had quite a few hours with the LHY psu and I can report back that it's a considerable improvement to my ears. Wider soundstage and clarity. Also did an easily switchable A-B test between two node 130s running through my SLI-80. The non-LHY was courser(etchier?) and suffered from less dynamics.
Another comparison made was to run the upgraded node through the R2R dac in my Hifiman EF-400 that was pulled from my pc desktop system. The node was formerly run through the dac of my Marantz 30n SACD. What a huuuuuge difference... for the better! It must be an R2R thing, because I've put other chip-based dacs in my system and they couldn't pull off what the Hifiman has done. The sound is brought to the level of "where did the time go" listening sessions. Can't imagine what an upgraded streamer and R2R will do for my system over what I'm running now - but, eventually, I'm going to find out!