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Before
alignment of the optics and focuser can begin, I had to drill the
holes for the focuser to be attached. Now I know you are wondering
why in the world are those focuser mounting holes are so large!?
Well, it just so happened that I had purchased a 50 count box of
1/4"-20 x 3/8" inch oval head stainless steel screw at a very
reasonable price. In addition, their heads have a beveled edge and
flat bottom that can be
submerged into the recess of a sided hole, which in turn would render
superior non-shifting holding strength to the focuser once
installed.
Click on
the small adjoining diagram above the picture to see what I mean.
Once the
focuser has been positioned correctly using the laser collimator,
marks will be placed through the holes of the main tube and onto the
side of the focuser flange. Drilling and tapping would follow.
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