How long should I wait before switching from my Aspire
nautilus Mini Premium Kit, and my iTaste MVP 2.0, to an an Hexohm box mod?
As long as it takes to learn how to use the new device safely

Know battery safety -
1) you don't want to pull more amps than the battery pair can handle - batteries in series work different than batteries in parallel
2) buy sets of two high drain high amp batteries and marry them - charge together, use together, never use separately or with another couple (batteries work best in monogamous relationships - one used by itself or with another may cause the other to explode... not unlike with people LOL)
3) ohms law (teaches you about the relationship between watts, volts, ohms, and amps)
4) limits of the OKR chip that is in the hex ohm, and how it manages the batteries.
5) the safety mechanisms in the device, and the things you have to watch out for on your own
^not a complete list, but a starting place to get your research going, usually starting is the hardest part
