Deck height within spec or not? Options

[jmargush]

I have been measuring my deck height in preparation for setting compression ratio once the heads arrive.

Measuring at the center of the piston with no rings

After the first set up I had 1 out of the four that was .012" (#2 compared to #1)less that the others.
I have tried moving a piston and tried various cylinders and got the difference down to .007". the other cylinders don't vary more than .002"

Fearing that a cylinder register has dropped some (case was not decked), when I was changing pistons I laid a straight edge across the registers and I can't see any gaps. I know this isn't the best way to check but my deck height plate doesn't allow me to measure the 2 cylinder heights compared to one another.

So the question is is that too much variation in deck height between 1 &2? Do I need to tear the case apart and have it decked? Is there something else i can measure as another check?