Did y'all know that SMOK means "Dragon" in Polish? Good name!
I just ordered a 5 pack of Dual Coil Echo-E cartos. I think I like the Echos better. They seem to have a real tube down the center, and they don't taste burned, even if you run them dry, which is not something I do very often. They fill nicely with a syringe on the first fill, and then drip or shoot in. The tube protrudes, so you can pool the dripped liquid and let it soak in. The regular ones are 2.5 Ohms, the Dual Coils are supposed to be around 1.6 and give hotter flavor. Mountain vapor has them in Metal and Black $18 with shipping for 5. We'll see. Another try. The EMDCCs with no real tube seem to swell up and draw harder.
I dropped a Joye eGo battery hard on the office "carpet", and it never lit up again, and 2 ohm Bogies are hard to criticize.
Meanwhile I've perfected my scale filling technique. Put a carto on the scale, say we get 9.3 grams. Subtract that from the full weight scrawled on each carto box, say 10.5 for an Echo, divide by the density of the juice, mine are all VG at 1.2 g/ml, and fill the syringe with that volume of liquid, 1 ml here, shoot it, bam, set it aside to diffuse a few minutes ... next?