Doesn't Castaway have a "mailbox" for singles? Also, given the extremely low incidents of tanks blowing up, I would have no problem standing by tanks as they filled. Fortunately, unlike Divers Direct, they can fill tanks out side of their mailbox. Divers Direct couldn't fit my buddy's HP120s or LP120s in their mailbox, and refused to fill them. That's why I'm never going back to Diver's Direct. Castaway is closer, has good prices (*cough*needtosellgasbycubicfoot*cough*), is more personable (owner answered my email promptly and responds on the boards here too, that's awesome!) and will fill your tanks no matter what.....even if they overfill
Castaway does NOT have a DIN pressure guage, atleast they didn't when I was there last week, trying to get my doubles filled. I didn't have my regs with me so I hooked them back up to the banks and opened the valves to see what they were sitting at, I don't understand everything about tank filling but that seems to my brain likeit would work, right? Open both sides, if needle doesn't move then the bank I'm filling from and my bottles are both at the pressure on the guage, right?
For what it's worth, I always like to watch and make sure my tanks are filled right. With doubled MP aluminum 100s, I want a fill to 3500 hot or more.
The guy there couldn't have filled my doubles to 6600, not even if he tried. He's not going to kill anyone, but I really really really think it's somewhat important for dive shops to properly train employees before leaving them alone. The only other alternative is to say "you'll have to leave the tanks overnight" and that is not the best in my opinion. The primary reason I go to dive shops is for air, that is what they need most to be able to provide.
Fortunately, it seems like Castaway is going to resolve this issue and train their employees. I respect them more for it! I also am glad that the owner came on the boards and gave an objective response to what amounts to several criticisms: three divers in the last week or so have said they have had some funky experiences at Castaway.
Will I go there for air? No. Not unless I have to. Why? Because I pay $10 to top my doubles off from 2500 to 3300. That seems unfair to me. That's about 50 cubic feet of air, or slightly over half of an aluminum 80 drained to maybe 500 psi? I don't feel like calculating the exact pressure. But still, I pay double. So I won't go to Castaway unless I really need air, unless they are willing to find some more, in my opinion, equitable way to sell me air. I know we just had a huge debate over whether it's fair for a shop to charge what they do, instead of by the cubic foot, and I'm not saying Castaway is a bad shop, but if I can wait until I'm in Gainesville for a weekend, I can save about $6 by getting nitrox by the cubic foot at Cave East. For what it's worth, CEE had one employee who wasn't a diver at all. He didn't know how to fill tanks either, and I ended up doing most of the fill there too. No place is perfect.
So Castaway, what you need is a DIN pressure guage, possibly convert another whip to DIN (only one is DIN, right?), start selling gas to doubles divers by the cubic foot (at the very least, it would be nice if you could say "if it's under half full, then $5/tank, if it's over half full, $3/tank" but charging by the cubic foot would be better) and try to train your employees better before leaving them all by themselves
Also, I wouldn't mind if they could find some way to work more hand in hand with the dive club on campus. I don't know exactly if they, as I'm not a member, but it doesn't seem like they are hand in hand. They are the closest shop and I'm sure that they could each scratch each other's backs somehow if they aren't already! For example, maybe you could offer air by the cubic foot to dive club members? *hint hint*

I'm looking for some reason to join the dive club...(they don't offer much to cave divers, and I'm not really intersted in ocean dives at $60/day..)
Thank you Castaway!!!