I will try to post in this old thread :)
I have ET 2.5. with high pressure manifold for shop compressor installed on Nakamichi Dragon-CT. Bought new directly from ET. Works fine for about 18 years and no problems at all. I use oilless compressor with 40L tank and few filters in path.
https://audiokarma.org/forums/index.php?attachments/dragon_ct_eminent_vdh-2-jpg.3380049/

