Stefano,
If you have any trouble with your axles/CVs after they have been put through the paces let me know. I have LOTS of experience with the chromoly axles and CVs. I have actually twisted a few of those alxes but on a road race car with 750hp and 14 1/2 Goodyear slicks outback.
In case you don't know , CVs love Krytox ..... just don't get it on your hands
http://en.wikipedia.org/wiki/Krytox