Crossfeed solution

The link to the "Headphone Amplifier Evaluation Board" by Dimitri is down. Perhaps this is the correct document: https://www.angelfire.com/az3/dimitri/images/Headphone_Amplifier_Evaluation_Board.pdf

In post 10 of this thread, you refer us to references 4 and 5 in that document. However, the link to the "F5‐HA Discrete All FET Class A Headphone Amplifier" is also dead (provides a strange redirect). Where can this document be accessed?

Thanks,
Bryan