It honestly all depends on what's comfortable. I'm much more comfy with "sniper" styled pumps like converted Autocockers and CCM's but others are better off with Phantoms or Trracers. And Converted AC's really aren't that advanced honestly, the biggest thing would be to "sweetspot", which you can find tutorials for in the stickys. (all you need is allen keys and some chrono time, really). Hope I helped out a bit!