As you know most of the local liquids, if bought at a vendor, is only available up to 6mg, because of popular demand. So it is sometimes frustrating for our hard hitters '12mg, 18mg' guys. Now for my question. Say I buy a 30ml liquid 70vg/30pg 6mg nicotine, and I want to increase my nicotine content to say between 10 and 14mg, how can it be done and if how and what must I get?