I am trying VG for the first time and need a little help cutting it with pure grain alcohol. I've read the posts that say add "some" or "a little" pga to reduce the thickness but to me that's like asking how long is a piece of string. I am not a good cook, never learned how many grams were in a pinch. I am an excellant lab tech however and can prepare colour film chemistry from raw reagents. The differance being that I know how much a gram (for example) is. Would someone please tell me how many drops of pga to add to the vg?