Ralf Bohnen, the owner, died unexpectedly last year. His uncle wanted to sell the site and, if he couldn’t find a buyer, make all the plans publicly available.
The site is online again with one new, three-day-old video. Let’s see what happens.
Good video, but in German. Subtitles available so maybe a translation will be possible.
He‘d have to do it himself. I didn‘t bother to find out yet who the guy is. 
I have translated the subtitle for that video.
Add the file unzipped to the same folder that the video is saved in and in the player turn on subtitles and select this file.
Estlcam Steuerkarte Arduino CLUB Mega 2560 CNC-Shield selber löten.zip (20.7 KB)