But all this doesn't mean you cannot use stock attys or cartos on a Reo either. If anything, a Reo will make the experience better. I hated every carto I ever ran across - until I put them on a bottom feeder. That whole freakin' PITA of a carto flooding out the bottom, or running dry and ruining it, is eliminated on a Reo. Any over-fill comes right out the bottom, is contained by the catch cup, and feeds right back into the Reo. Since you don't have to fiddle filling they way you normally do with a carto you can keep 'em wet all the time and not singe the filler. In my experience, because of that they last longer on a Reo.
Currently using an Ikenvape 1.8ohm 306 atty with a TheEcig glass drip tip on it. (And not gonna apologize for it either.

) It's all better on a Reo.
You have options - that's all.