I was told about another unusual RDA. The Uwell Rafale X Rda. I found one at Eciggity for $10. It's definitely for dual coil series build. I thought it was interesting because now I can use regular coils on stacked and series mods. If it works well I'll pick up at least one maybe two more. Does anyone have or have you even heard of the Uwell Rafale X RDA?