If anybody wants a copy of the 3D STL file for a base for either the UNO or Mega board formats as shown in the photo, please post a reply to myself (neil@mudfords.net).
If there is sufficient response I will set up a web page and ask respondents to download from there.
The only hardware required is M3 x 3mm machine screws - 3 for the UNO and 4 for the Mega.
Rgds,
Neil.