Reaching the optimum size of 1/4" using a progression of increasing
bit sizes, all three (3) holes (spaced at 120-degrees apart) have been
precisely drilled into the main tube for mounting the objective lens
cell assembly.
Also make not that I filed a notch at the main
tube's edge in front of one of the holes for aligning and mounting of
the objective lens cell in the correct orientation. Later on, you will
see that I drew a corresponding Sharpie mark above one of the mounting
holes in the rear lens cell for alignment for both the objective lens
cell and dew shield.
Now it is time to clean up the holes.
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