oh, that's a perfectly fine usage for it. but it just won't go all the way down to 0, then it's no longer a nicotine base....it's just some liquid.
mebbe Halo could sell a 0mg liquid, dunno the market for it.
the next best thing i would think for you would be get a flavor you like in a sample size (7ml) that's 0mg and use it to dilute the same flavor your currently working on.
or get something that works great as a mixer, like Kringle's or Malibu in 0mg and try out some spiffy new flavor combos as you work yer way down.