Well I flashed my VISA, it arrived in a box left at the door. My new AIR 2! After configuring it to my BCD and connected a tank and turning on the air - it free flowed, then it would no flow! I spent an hour servicing the damn thing and now it works well (scubapro must be slipping - or making too much money). I gave it a whirl today on a dive to 18 m (60 ft). It's quite good, although I'd hate to actually ever use it! It is a redundant 2nd stage for ME only (I have another ocky for others). I guess it is OK. Sand would definitely be an issue if it gets between the diaphrame and the seat. Time will tell if I continue to use it. Certainly, if it plays up too much, or free flows in turbid conditions - I'll be moving it along. Overall, a good idea, and with proper care and maintenance, a good redundant second stage. I prefer my apex TX100 though!! Dive safe "I opened the thread!"