'For troubleshooting and comparing versions 2.2, 2.3, and 2.4, I am looking for the schematics for version 2.2 and 2.3 from Ulf's layout. Are these hidden somewhere here, or are they no longer available on the server?'
It would be great if someone could email me the schematic, as my version 2.2 needs to be checked, and troubleshooting is quite difficult without a circuit diagram.