large builds

Im looking for a velocity style 28 or 30mm RDA for my triple series box does anyone know of any two post larger RDAs? ive looked everywhere and came up with nothing please help me out or tell me if these even exist.

Hi Guys and Gals, I built my first ever twisted clapton coils last night and had them glowing nicely in my Velocity RDA, however when I went to put the top cap on, it shorted due to the grub screws making contact with the cap. Seems to be that I cant tighten the grub screws enough with thicker...