Nick,
Some useful informations here (strip guides for Diana 'Giss' rifles & pistols :
https://forum.vintageairgunsgallery....rguns-manuals/
And here are the URL for the 'anotherairgunblog' articles :
https://anotherairgunblog.blogspot.c...ly-part-1.html
https://anotherairgunblog.blogspot.c...ly-part-2.html
Have fun & a good Sunday
Best regards
Russ