Its pretty much what i did all day yesterday dialing up & down , looking at cgminer as it hits plateau and resets every few secs and looking at the values on the usb ameter as it responds to cgminer and to be honest, i dont even know what am looking for ... i just see the amperage go up until it resets when cgminer hits plateau ..
its been more like blind tuning & gambling, hoping to hit the target.. 
i believe there are measures to reach this..
this was supposed to be one of the fun part, i waited another 2 weeks for this final phase using the ameter to finally set up the rest of the sticks but its not at the moment ..

I have atleast one stick i did not tune because it already runs efficiently at the set hashrate without issues ...

I have tried to use readings from that one to see how to set the others but still ...

lots of us here have used the usb ameter to tune their sticks into stable hashrate, i need your inputs ... 

Am I looking in the wrong direction ? Am I mising something ?  If you keep dialing clockwise / anticlockwise, does it start all over from 0 after a 360 dial ? or it keeps going 360+ , 720+ etc ? 

and sometimes while dialing, i hear a tini tiny fast beep with fast flashing light on the stick, is that a too high dial or too low dial signal?

this is the ameter i use
https://www.amazon.com/Voltmeter-Ammeter-Current-Multimeter-Suitable/dp/B08RHKVHJZ/ref=sr_1_29?keywords=usb+volt+amp+meter&qid=1647004125&sr=8-29#descriptionAndDetails

How can i use the reference stick to setup the rest of them ?