Great question - Lots of info here! I have also fallen in love with single coil, especially since I vape at +/- 1ohm. I like the Drop Solo for a dripper, but now I mostly use them at home or for DIY testing. My current tank love is the OBS Engine Nano, also a 30mm but it fits my Tesla 120w perfectly and the flavor is fantastic. I ordered the duel coil version of the Engine to see how it does with a single coil setup. I was relieved to find out this was possible, especially since the original Engines are currently about 30% cheaper than the Nanos.