One more question Derick, I've noticed that the higher the PG concentration in juice the more it burns my throat, so have resulted in avoiding the higher PG blends I have. Is PG/VG equally safe for use? Maybe I'm just PG sensitive? Was thinkin of using maybe a little more distilled water in VG blends.
Indeed, in addition to carrying flavour, PG is responsible for what we call throat hit - the kind of thump you get when you inhale vapour. PG is completely safe and the throat burn is normal - but it should generally not occur too much at 50/50 or lower PG ratios (65 PG 35 VG and up can be quite nasty on the throat). Higher nicotine levels can also cause throat irritation especially when combined with a high PG ratio.
But...some people are actually more sensitive to PG. Best way to find out is to share your juice with another vaper and get some feedback on whether they feel the same irritation (i.e. a juice issue) or not (i.e. personal sensitivity to PG)