My low tech method for PID on Quest drum

I ran a roast with manual control of temperature
I monitored with Roastlogger
I examined the ET graph and eyeballed a through line that would go through the hills and valleys as an average (475f)
I set my PID to that temperature
I ran a roast where the PID maintained 475f throughout with a nice curve and declining ROR
Then I noted the dip and flick at the end
And I set a lower PID target for the ET for that time period at the end of the roast

I then used that info to set up a recipe in steps... start with PID target for ET, when BT hits x reset PID target for ET down by some degrees and so on

My result was a Rao style declining ROR in BT and a nice swoop curve for BT

The automated "recipe" allowed my wife to roast easily when I was away