Laser power compensation

I know there is a huge variation in power % settings from machine to machine. I believe it to be a miss match problem between the tube and the HV power supply, but I have been wrong. I have a 130w EFR tube and a no name Chicom PS and at the max safe mA in RDw I run at 45%. Is there a way to compensate for the miss match in LB- I have never figured it out in RDw. I downloaded a cut and engrave test from this site somewhere and am tailoring it to my machine and when I click the right most red patch and properties it sez power max/min 90/10 and power scale 50- so I guess 45%?
Not sure where I found this file but I like it a lot. .

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