Awesome
You are reading it right. I think in this case the e-
juice me up calculator is overkill. You're putting one flavoring into pre-mixed nic base - so all you need is a simple percentage that can probably be done in your head.
The calculator is an excellent aid when you start making your own recipes or following those of other members.
As for a direct answer to your question, some members do add either PGA (pure grain alcohol like vodka or everclear), saline or plain distilled water to thin their liquid. It really helps get improved wicking when using high VG ratios.