What I was referring to is the fact he is so mindset on the liquid mixes all having about the same viscosity, when they can't be unless he is using other additives like is sometimes done, including in DIY. He doesn't say what they are if he does. Really doesn't matter to me what the PG/VG is as long as it's at least 50% VG. I started out buying/making 70/30 at the rec of someone, but haven't use that ratio for over a year (I do not have any allegies, to PG or otherwise). As long as the 100VG/OPG will wick in a Heron/Spheroid, I'm good. I know that is his personal favorite, but I don't know what gear he uses it in. I have all three mixes coming to find out, and can easily custom mix from them if needed to get what works best for me in the Herons.