I figured that since they don't sell these on V4L (Hopefully they will soon!) I figured it would be ok to share this with others here. I've got a DAV with a 6ml tank installed and I LOVE it. The only thing I didn't care for to much was refilling it. Even if I got lucky and got one of he "needle" type bottles it still wasn't the greatest. I found some actual needle type bottles that are outstanding! I purchased two 30 ML bottles and they make refilling a snap! I can pretty much get my tank filled up to about 95% full just by sliding down the carto just enough to allow the needle to fit.
PM me for the link.