Well, finally I´ve become brave

and have installed the last fw 4.10.11655 patching it with kobopatch
Everything is running fine, so

to geek1101, GeoffR, Jackiew and all people contributing to the patches.
No Overdrive option, but well, I live in Spain and there is no support for it here.
For reference, I have installed the following patches:
libnickel.so.1.0.0:- My 24 line spacing values
- Custom left & right margins
- ePub fixed top/bottom margins
- Fix three KePub fullScreenReading bugs
- Un-Force user text-align in div,p tags in KePubs
- Allow searches on Extra dictionaries
- Clock display duration
nickel:- Show all games
- Fix reading stats/author name cut off when series is showing
I have also installed a corrected translation file, a new hyphenation dict (thank you to jcn363

) and a modified FB2.xls

(no, it is still not working well with fb2, but I have tried to change the default css and now it looks better. Anyway, if someone can help to improve the fb2 rendering ...

)