I want to get into diy liquid to save money. I was thinking of ordering the 236ml bottle of nicotine base from Mount Baker Vapor. On the order options it asks to specify what percentage of PG/VG I want the base to be. Does this imply that no more PG/VG is needed, that all I need to do is add flavor? If so, that would be perfect as I'd like to keep it simple at first. Thanks in advance and happy vaping!