I managed to correct the first board without a microscope, to do this my 3 layer combination of magnifying goggles and reading glasses had to be about 1" away from the oscillator to be in focus.
So I ordered an AMScope SM-3T 7X-45X Trinocular Stereo Zoom Microscope. Oh what a difference, made the next three fairly trivial to correct. I'm still waiting for a Barlow lens, 0.5x on order, I think a 0.75 might be better suited but I will wait to try the 0.5.
Update, I received the 0.5 Barlow lens, and it is near perfect, focus range is now about 8" from the working surface. For focus I needed to be 1" above the existing working surface, so I made a small base that I can move in when needed, just waiting for a static mat for the top.
I mounted the boom to the metal rack that supports my Tek oscilloscope and this allows me to slide the AmScope up and out of the way in seconds while not consuming any work space for the base. Overall I'm quite happy with the AmScope and the setup.