Unless they've changed Blu's are 510 threaded.....
I must've missed a post or two. Blu's are def 510. I know this because all the leftover blu carts I had fit perfectly into my 510 connectors.
On another note, I've figured out that my direct usb mods aren't having a power issue at all, they're having a leaking issue. Whenever one stops working right, I unscrew the tankomizer and find a tiny drop of eliquid on the battery connector. Drying it off immediately fixes the issue. First I thought it was a bad cartomizer, so I tried different ones of varying resistance that work fine on other mods, and every cart I have works fine except when used on the direct usb mod. My only assumption is that the slightly higher voltage is causing the carto to leak for some reason?
All my other mods use 4xAAA batteries, which should add up to 6 volts, but is actually closer to 5 volts for whatever reason. I may have to finally get a multimeter to figure this one out...
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