Nice collection you there. If only the "tophat" part on the Avidlyfe mods were always flush (top of the mod) with different atomizers, I'd probably already have one, they look nice. A co worker at my shop brings his Able to work and I noticed if the 510 is protruding too much on atomizers.. gap. I'm a fan of flush.
That's not the mods fault, it's your coworker! Able's are hybrids. You remove the top cap, screw in your RDA, then screw that assembly (top cap and RDA) onto the tube. Your RDA always sits flush unless you put the top cap on the tube first and then screw the RDA onto the top cap.