Thanks for your welcome Gobfish.
Thank you also rigdiver.
Yes, I found a lot of Informations here and I think I can learn a lot about rebreather on this site. And when it's just to train my english.

Maybe we can have someday a beer together.
Hi Beanie
I must say, this is a realy friendly place to meet other divers from all around the world. I'm happy that I found this place.
Bye, Michael...