More on the cyclone and the low profile grand - The optional air flow control cap that you can get for the cyclone atomizer will not fit in the standard drip well of the REO Grand (the top cap is 18mm wide) so that is what created the need for the milled down or "low profile" on the grand (along with other modders that like to modify other atomizers but i dont have the technical ability to mod anything) I have used the ERA, the Hornet the RM2 , A-7, the original reomizer and the new igo-s and in my opinion the cyclone is far and away the best ( Its also all stainless steel if that matters to you) with the ERA being second and the RM2 being 3rd place. If you like a tight draw , you dont need the AFC top cap for the cyclone and you wont need a low profile or milled down REO as the stock cap of the cyclone fits fine in the stock grand. I prefer a very loose air draw for the big lung hits and the AFC cap is perfect for that - I open it wide open when i want that and when i want more flavor and less vapor - I close the top cap down and make it as tight as the stock hole so the afc cap is perfect for me but probably unnecessary for most. I have used genesis styles, kayfuns , billet boxes , most everything and the best vape for me is on a Cyclone with AFC on a Reo Grand at .8 microcoil cotton wick (28ga kanthal with 7-8 wraps on a darkzero coil jig or a 1/16 drill bit)