I only do reverse sear now... it is almost foolproof...
BUT air REQUIRES a thermometer with a probe.
I set my thermometer for 117 and set by smoker to Low and slow, about 225 on my PG500.
Let it run till I hear the beep.
Take out the steaks, crank my PG500 to BROIL (600deg) and let it get HOT HOT HOT.
It never gets to the set temp, but the grates get hot hot and the pit starts to glow. It’s H O T.
1 min per side is about all I need to get a nice char. 45seconds if I want to cross hatch, flip and turn 90deg, it cools slightly so the extra 15 seconds is ok. Either case, I get black and purple every time.
PS... Don’t just turn off your grill if it is really really hot, do a cool down of some kind. Even if it means just running it at 170deg with it open for 15 min, make sure the auger is not too hot when you shut down, I have had hopper smolders because the end of the auger was so hot...the pellets were coming out pre-lit... little fire balls...
Don’t try it without a probe, you will waste good meat.