1) Some people prefer the pinky switch. I've tried it, not for me.
2) the center connector is still there, the brass tube runs through it.
a) slide the atomiser onto the tube and screw it in as usual.
b) The atomiser has a hole that runs straight up to the coil which is where the feed tube goes. The tube, in turn, feeds juice directly to the coil where it's vaporised.
3) that was 3 questions..lol
4) I'm originally from Latham, NY where I hope to be moving back to as soon as funds allow.
5) More answers than you expected but I hope it helps!