This is great tooI've also been to Twins a few times myself. It's where I got my stuff when I first started rolling my own.
I do hope you can work something out with a vendor so you can carry juice other than dekang. Maybe you could start diy'ing and have your own brand
I'm not even touching dekang juices...
I do my own DIY, but not on a large scale. I may put a few of my samples in there for people to try for free, and in exchange ask them for their feedback. I've got s few vendors in mind to cover the masses of flavor whores... I will keep you posted on an ETA. Mid-July is the earliest I'd be getting anything in there.
Sent from my Galaxy Nexus using David Copperfield's magic fairy dust.