<font color='#0000FF'>Matty,
yeah, the ray is good for 22m and yes they are good, but are primarily designed for wet suit diving. although it is very easy to mount one on a good wing.
the po2 sensor issue has never really been an issue as far as i'm concerned, although i do own one. all i'm prepared to say is ....i dive a dolphin regularly without one and i aint come to any harm. although personally i wont go beyond thirty'ish without one. if you posess a sound understanding of nitrox? you will have no problem's.
the buoyancy of the unit and a different breathe than what your used to are your biggest issue's. Forget about OC and start again, in a while you will be wondering why you didnt do it sooner!!
welcome to the club!!
HTH
regard's
trox
