Experimenting? None, really. Just re-wicked my Killer (it got a little gross) without recoiling.
So far the Angel tank is the best performer. The Phiniac is my 2nd choice.. It's pretty.. And easy to perfect the air pressure since it will sit flat on top of the PV. The Angel Tank caps are a huge PITA to get off.. my only complaint about the tank. The caps are TOO well-fitted. lol
And no I have not run just Kanthal. I use NR wire and I don't see that changing.
Just bought a cordless drill, going to go open up the airholes in some of my RBAs!