In addition to supporting the Etherregen with LPSU and masterclock I have now introduced an Ocxo clocked swith with LPS from China. The further tightening and blackening of the sound is very worthwhile for the $300 spent. This is purely to improve the Ethernet connection without using the master clock, yet results in a further significant improvement.
Chinese Ocxo Switch->DXE ISO PLUS->Etherregen on Antelope Audiophile Clock and LPSU->InnuOS Zenith Mk3.