Another PD Creative / Node 2i user here. Wonderful improvement over stock. I use an SBooster to power the board. This feeds a modified MHDT Orchid with a 7308 tube. No desire to upgrade.
Upgrading Bluesound Node power supply with PD Creative (Hans B. reviews on Youtube)
Prices for streamers can vary a lot, and the Bluesound Node series has gotten good attention as a lower-tier priced streamer. Most who appreciate it also send its sound stream to an external DAC.
I've replied in some threads that upgrading the power supply of the BS Node could elevate its performance without needing to spend many times the price of the Node. (I got mine for about $400.) I've recommended PD Creative as a place to get the needed power board which replaces the one inside the Node, making it now connectable to a linear power supply.
When I corresponded with PD Creative, they responded quickly and helpfully, despite the fact that at that time my correspondent was getting his personal home ready to take and house a family fleeing the war in Ukraine. Talk about multi-tasking.
Hans has done a service with this video, not only explaining how the PD Creative upgrade works, but also by illustrating it and commenting on the sound of the upgrade with multiple linear power supplies. He's fan of PD Creative, and so am I.