Ok, I'll chime in - use the aga-t repair kit on either the RSST or the AC9 - or buy the spare parts from vapinaze - they fit both the RSST and obviously the AC9 will fix the leak through the center pin. As for Nemesis vs Poldiac, Nemesis. Thicker, less parts, less failure points and more options. Aesthetically - both win. Tip to Nemesis for above points.
-CF