i think you will surely enjoy the VECTOR RDA by VLS
its exactly what you're looking for , 3 post, non-spinning center post, wide bore tip (built-in may be an issue if you have specific drip tips you like), 22mm, and a very generous juice well (negative posts have an 'underpass' that allows for more juice/cotton capacity)
i've had countless issues with typical RDA's dripping/leaking out the side air holes. this rda is top afc. machining quality is probably the best i've ever seen next to Norbert (Origen).
my favorite feature of this rda is never having to fully uncap your dripper. you can either drip thru the built in wide bore tip or remove the top portion of the cap. either way you're not getting ANY leaks.
I cant say enough good things about it.