The only ones I've had that have been crap are the dse801's I got from Ruyan Direct. Way way high bridge, they mess up cart material, lower vapor production, and inconsistent draw from atomizer to atomizer. Overall, my worst performers. I have them shelved.
EXACTLY my experience, and from two completely different sellers. Bridge too high for my RN4072 blank carts so I resorted to dripping, but still, it's hit or miss (mostly miss) with the draw and vapor production -- I bought 10 of them, and went through 4 of them in two weeks before one of them didn't completely suck.
Where are my beloved RN4072 attys??? Can't someone please help?