Depends on your level your looking for. Using the mirror method gets you very close but with your shibata stylus you want better than close. You need a way to measure output of each channel using test LP to optimize the output and also minimize crosstalk. This also gets you the optimum soundstage from your 2MB.
I use a Foz meter, not sure what is controversial about it. It reads both channels and also you can read/adjust for minimal crosstalk.
I use a Foz meter, not sure what is controversial about it. It reads both channels and also you can read/adjust for minimal crosstalk.