I installed the TP upgraded PSU earlier this week. The most difficult thing it getting the two halves of the Node to click into place correctly when reassembling it!
So far as the sound goes, TP state that it takes a week to burn in with further improvments over a month. So it started off a bit rough, got better, got worse and now it's getting better again.
Thanks Ian
Could you tell us what Node version you have and whether you are using the Node as a streamer or internal Dac.
Thanks