Correct but why would you want to do it that way and not just calculate you final mix base (50PG/50VG/NIC18mg) for instance?
If you just want to make your base and freeze the rest then just make what will last you 3 month (250ml) at once at your final mixing mix strength. What it seems to me is your just creating an extra step in this whole process.
I agree. I don't do this either, but he was asking why someone would and how to do it. I would suggest to anyone who is afraid of working with the 100mg on every recipe to just buy the 36mg or 50mg to start with. But it may also be cheaper this way too to make your own. To each his own.