There's a few restricted DTL and MTL RDA's and RDTA's on the market to choose from
@Kgb424, both original and clone.
One of my favourite ones is the Cthulhu Mods Mjölnir RDA, it has a lot of features that make it a flavour chaser. Couple it or something else with a Vandy Vape Pulse V2 Squonk mod and you get a nice little future proof setup.
But a less cloudy tank has caught my eye though, the Freemax Fireluke 22. As it does from a restricted DTL to MTL, and Freemax are going to bundle it in another kit with a new Maxus mod.
Hopefully it'll have the smartload tech, so you don't need to worry about what way the battery goes in the mod.