BurhanMuntasser,
Thanks for your advice...can you give me a little more details as to why it was not a good design and what was so problematic about it?
-Zef
The ruby never worked right and there were always problems with it. I used to own a dive center in NY and we were a Mares dealer and an authorized service center, we dealt with this regulator issues and there was never a complete resolution to these issues because of the ruby. I wouldn't touch it, invest your money for something more reliable and more current in design and availability.