Readings were corrected for energy, temperature and stand-off of the electron applicator from the patient surface.
The copper or brass stand-off screws come with the case.
It is true, we are such poor navigators that our thoughts, for the most part, stand off and on upon a harborless coast, are conversant only with the bights of the bays of poesy, or steer for the public ports of entry, and go into the dry docks of science, where they merely refit for this world, and no natural currents concur to individualize them.
After reflow this produces a fuller solder filet, with a greater component stand-off from the board.
Others have a stand off approach, and will let you look around without bothering you.