I am glad I got pushed towards starting by weight, seems like it’d be a total waste buying all the lab equipment to start by volume only later to switch to weight. Pipets are much cheaper than syringes! LOL
When I bake I mix by weight because of the need to be very exacting... I have everything needed to mix by weight as a result for my ejuice..
And I don't do it. Why? Because ejuice doesn't need to be that exacting. The weight of VG doesn't change significantly with humidity like flour does, for instance.
Contrary to what some people think, making ejuice is more similar to making a nice sauce or stew, than it is to baking bread...
I don't even measure my flavors most the time.. I measure my nicotine by volume, my VG by volume, and then add my flavors by feel..
Just like cooking once you get the hang of it.