Congrats on the MD-108T. I listen to that M-F 9AM-12PM and it is a great tuner. I use the Signal Sleuth and the ST-2 antenna. I am near the ocean surrounded by mountains and the Sleuth and ST-2 are needed,
All of my non-tuner gear is from Benchmark, Schitt, and CODA and I have not felt the power cords made any difference with them. So, I have not invested much money on cords. I did buy a Pangea non-amp cord from someone but that is on a Schitt DAC that may not even benefit from it.
I am cleaning my 2 systems today and will replace the Benchmark OEM cord on the MD-108T with the Pangea to see if it makes a difference. I think it would on the tuner.
Let me know what you find with cords on the MD-108T,