***Hi Walter, I hope you are not suggesting to do away with compression testing.***
No, simply pointing out that a static compression test is s poor way to tell if a valve is leaking when the engine is running. The EMS will show that every time. We use compression testing because before we had EMS, it was all we had. It has "some" value, but is a sub-optimal way to tell if the valve is leaking dynamically.
***I believe you and your followers regarding LOP but I have my doubts ***
The weak link in ANY aircraft endeavor is the biological interface.
BUT, remember, if it can screw up LOP, it can screw up ROP and the worst possible mixture setting where heat and pressure are concerned is at 40dF ROP. So, how bad could it be mis-setting LOP?