i have a rm6-i prefer using one of my plume veil top caps on it since the one it comes with tends to pool up by the drip tip and gurgle when inhaling, which can get annoying.
build quality-not really sure what you mean by that, but it's a pretty typical 3 post build platform. the top cap section it comes with is nice in that it allows for a deeper
juice well, and minus the aforementioned issue with gurgling i sometimes get, its a pretty solid
rda-actually the one i probably use the most. (with the pv top cap though)