Nikon Repair Question

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I don't know how Nikon checks a lens mount to see if it is straight or flat like it is supposed to be. My working experience is in the automotive field where we would occasionally check things like cylinder heads and engine block to head mounting surfaces to make sure they were flat and within pretty tight tolerances. The tools we used to check those surfaces amounted to nothing but a straight edge and feeler gauges. I have watched other technicians check the flatness of these surfaces, then I would check it behind them just to make sure, sometimes my measurements were totally different than theirs. I think the tools you use to check specs on something are only as good as the person using those tools. I would hope the tools made to check these tolerances have advanced enough in the last 20 plus years to make those measurements more reliable and repeatable. Then again, it could also be a case of a technician being a little unsure of his measuring technique and feeling he needed to cover his butt just in case, so he would not have something coming back on him, or someone blaming him for a bent mount if the camera came back with a focus problem. I have also unfortunately been witness to some unscrupulous technicians that would try to sell customers something they did not need, I hope that is not the case with Nikon but then again you never know. I certainly hope your 750 performs like it should when you get it back.
 
The camera arrived yesterday. It had been factory reset, so I spent a little time resetting the controls and U1 and U2 selections. If I'm able, I'm going to check the calibrations of my AF lenses tomorrow or Monday, then take some test images. then take it out for a spin in the country.

Thanks for all the support. I'm keeping my fingers crossed.
 
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