Hi Judydudi and Aardwolf,
Yes i did it - i took 2 pieces of LT3042 boards from China, replaced the capacitors against Nichicon types and fed the Digital and Analog supply from external.
I experienced no real big difference on standard setups ( Sony TA-F444ES + Dynaudio MSP110, 2xDynavox Tube Monos and T&A Criterion 160 ) but on my best Setup (2x Denon POA4400 + Dynaudio MSP400) the sound is significant better.
The power design of the Aroio is very good out of the box - i recommend investing in good speakers and amp before improving the Aroio’s power supply with expensive power supplies.
P.S. Last friday i got a pair of Dynaudio Focus 220 MKII that need a little repair. I will test with these too as soon as they will be ready to go. These speakers are the best in my house and i expect to get more details with them…