Something else to ponder over is the Royal hunter has guillotine style posts and screws which may cut thin wires, even 32g will cut easily, there are a lot of rda's on the market that have posts/screws set up so as they squeeze or snug the wire without cutting, as an example you have the Velocity rda but even using a Velocity you would have to make sure your main wire is centralized in the post holes as you tighten up the screws as thin wire can slip into the side of the post screws what with the small screws in comparison to the post holes, even 26g in my velocity rda's can slip out of place.
If you've already ordered your wire and you get problems with it being to small you can also take a good bunch of it and twist it up or get something like 28 or 26g and clapton your smaller wire on to that.
Good luck with it and let us know what you finally do