I just checked and Ian's site is working, you can find the NewBuff on this page: http://members.iinet.net.au/~ianmav/trs80/newstuff.htmThere's pictures floating of the NewBuff which was a replica of the buffered EI cable but it seems the site that lists it is currently down. I think the photos still work though.
You don’t happen to have any of his other schematics, do you? His website is gone and archive.org doesn’t seem to have archived any of the downloads.This is an old schematic from Pascal Holdry who did a lot of amazing work in recreating the TRS-80 hardware.
> Charles