Bruno, what I find funny is I come back and see the same posts requests for info that was yielded years ago and answered by a group that i considered one of the most knowledgeable I have come across.  
Where's Naudet when you need an unbiased German opinion on things 

 Miss that cat.
IK3 it doesn't take a rocket scientist to use the search button.  In your case, I am gathering more explanation is needed on the subject matter.
How to search on the web: 
By L. Ron. Hubbard
Type this in the above Search button at the top of the page and you will have all your questions answered.