If you walk into an ANDI shop and they start spouting "SafeAir" they are really talking about ultra pure Grade E breathing air, oxygen cleaned cylinders and oxygen built/clean valves and regulators.
Yes, it is overkill for the mainstream recreational scuba industry. Is it overkill for the technical/trimix espiring scuba diver? Maybe not.
I think it is better to have you equipment rigged, cleaned and upgraded for the most demanding situation you are moving toward. In this case partial pressure Nitrox blending, which is the standard ANDI method of making Nitrox fills.
Is an oxygen clean cylinder and valve necessary for a Nitrox fill off a banked (i.e. pre-mixed) Nitrox supply? No, it is not necessary.
Do ALL scuba shops that offer Nitrox, especially any percentage you might want, use banked mixes, no. Therefore having your gear oxygen cleaned and built with oxygen service parts is a good precationary measure because you might not fill at the same shop every time.
Physics is physics, oxygen under high pressure does weired and some what dangerous stuff. I'm not so sure that arguing aginst clean gear and cylinder content marking is such a good thing when you are dealing with the general public (i.e. mainstream scuba divers). That little peice of duct tape your write the MOD for a cylinder on might be ok for you, but what about the poor smuck resort diver that grabbs a cylinder of mix because it looks just like all the other cylinders laying around, except for that little peice of tape that got stuck to it? Mistakes in diving occur, lets promote procedures to minimize them instead of denouncing everything because it is more expensive.
you want to dive air only, you want to have cylinders that have never been mared by a VIP sticker or a sticker of any kind, then more-power-to-you. But be careful what you preach to the general diving community.
Oh, plus you might get banned from the ScubaBoard DIR forum
