I have an Ivogo Velocity clone that's just great. Easy build, great flavor and endless airflow options.
I also have two Petri 1.5 clones that are awesome as well. Outstanding flavor, perfect airflow for me and they both came with the matching Dotmod style drip tips. They're a bit more of a PITA to build on because the posts have two holes side by side and one screw to hold down the leads. I use 24 gauge and it can be difficult to get the screw to hold both of them down.
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Try a sleeper coil in the Petri. Once you have the first coil made and adjusted in the Petri, you can tighten the lead down and only have to deal with one side. It works with most 2 post RDAs.