OK, that was a fun read. LOL. now, on topic. OP, the bottom line is every dropper used by flavor makers is different. in being different each drop from bottle to bottle is not the same. one maker may use a 20 drop per ml and another may use a 10 drop per ml. there is no standard when it comes to the drip size. people on here are correct in telling you to make small batches because while not exactly like cooking/baking it is similar. you cant just double a recipe and expect it to come out just like the original. sometimes everything does work out just fine by just doubling or tripling or whatever but other times it doesnt. get yourself a graduated cylinder and do it the right way. you can find them just about anywhere including your local restaurant supply store you might even find them somewhere like "bed bath and beyond" in the cooking supply isle. the fact is, say you make 30ml with 20 drops of flavoring, if you move up to 300 ml of
juice 2000 drops may make it to strong. then you are playing the "lets thin it out" game. gues what happens then? you add PG or VG and now the flavor is to weak, SO you add more flavoring and again its to strong. its a vicious circle. posters here are just trying to help you out and save you from the headache that can come with DIY mixing. now, another option is, if the flavoring maker makes the exact
juice you want to make, you can email them and ask how many drops from there dropper would they use to make the size batch you want to make. i hope this makes sense and helps you out a little.