If you re-read the thread you will see that I agreed with you that while it might be true that it is more cost effective to have pre-banked, in all of my personal experiences I have only ever never found it to be more expensive to get fills at shops with pre-banked. I honestly can't believe you are still raving about this...
So in an effort to put this one to rest for the sake of all others on here; let me ask you something: How much do you charge for your pre-banked fills? I'm assuming you do have pre-banked since you've made the argument that it's so much more cost effective... I'm curious to see if our custom EANx fills are more or less expensive then your pre-banked EANx.
While my shop is a small ma and pa shop and we absolutely do our own Hydros in house and frankly I don't give a damn what you believe and what you don't.
Nice dodge on the whole "don't know anything about vis."
But to answer your dodge:
Nitrox is free to students.
Nitrox is $10 per tank no matter what size (AL80, LP95, Double 100s).
Nitrox is $5 per tank (again, regardless of size) if you're a dive club member ($40 a year).
That means, nitrox from the shop I frequent is 1/4-1/2 the cost of anywhere else I get fills.
That's awesome your shop can do a hydro in house. I have never heard of it in a small shop, since I can send my tanks out through my small shop and get them tumbled and hydro'd for $15 a tank. I'd have to double check, but I think a vis is $5.
Oh, and legally, you can't send a customer's tank off for hydro if it fails vis unless they already signed it over...because if it gets condemned because you sent it without their permission...guess who is buying them a new tank?
But to get back to my point: what are your qualifications to be passing out vis/hydro information on the internet?