Craig.
I would add ... when purchasing a phenolic adapter (4 hole) check to ensure that it is true on both surfaces. If not..place on a known flat surface of 600 grit paper and do the figure eight until you have it corrected. My purchase of same disclosed some
irregularities and required attention.
As Tech 1 explained to me quite awhile back.".New in Box" does not mean exactness nor total quality. Good Luck.