Consider [1] making a batch of 25% like N.E.T does and use that as your concentrated base (which of course you won't vape). Then, [2] in a separate empty bottle/batch, use 1 part of that concentrate and mix it with 4 parts of unflavored PG/VG (for example 10ml concentrated base + 40ml unflavored). This would yield a 5% final vape. By doing so, your concentrated base will continue to steep as you make more of your final vape batch/bottle later when needed - since adding pre-steeped concentrate to a batch of unflavored juice will require less steep time (or will be ready to vape right away depending on how long the concentrate has already been steeping). This is basically what I do when I DIY because you always have pre-steeped concentrate ready at all times to make your final vape. It reduces steep time of your final vape significantly. Experiment and enjoy!