I was thinking that perhaps you simply prefered to have the housing ride lower on the cup assembly so that there was more channel wick available for wicking... which doesn't sound like a bad idea at all. But if you consider that these things are all machined the same way, and most of us are adjusting the housing so that the pin is just about even, more or less, with the edge of the 510, then you're setup, with a lower seated base, would seem to result in the pin actually being left receeded into the connector. At least that's the way my kooky mind sees it. 
Anyway, whatever works for you is the best setup for sure! vape on.
Anyway, whatever works for you is the best setup for sure! vape on.