Hello down in Germany!
I have translated my swedish manual for how to repair Diana model 60 to english. You will find it on this link: http://www.mediafire.com/?onpy98l6i6zylp1
The format is Word 2007.
The manual will work for Diana 65 and 66 too. As you may know, the double piston system by Giss, is quite tricky to disassemble/assemble.
As far as I know, there are no other manuals for how to fix them, and to send them to Diana for new gaskets and springs will cost a lot.
This means that a lot of these quality guns are either stored "somewhere" or thrown away when the old cork gaskets are worn out.
Hope you like it and find it useful. Any comments are welcome, also in german! (I read german without problems)
Sorry for not writing in german, but I am from Sweden and my english is better than my german...
M.f.G.
/ Micke