Davac 4 was succesfully built by OK1USW, OK1UGE and OK2JTB.
Note: 600 DPI have images in Full resolution, MediaWiki uses thumbnails.
SMT variant by OK2JTB
All data: File:Davac4-ok2jtb.zip
Made by OK1UDC(SK) & OK1UGE
Note OK1ZIA: better use USB-B type connector
Combined Davac4 and contest machine RPi
Guys from OK1RPL made this compact contest solution.