Fan Speed and Temps - room for quiter operation ?

I’m loving the U4 except for Fan Noise. I did some tests running at each brightness level for 20 mins with ambient temps of 19c and measuring expelled air temps (digital thermometer probe held next to the air vent):

Presentation mode 29c
Normal Node 29c
Night Mode 27c
Eco Mode (hidden) 26c

So there’s a bit of thermal headroom to drop the fan speed for night mode and it would also be great to enable the super-eco mode with an even lower fan speed. Super-eco mode (accessed from the hidden android menu) is bright enough for me in a small dark room

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