IV - Elevation fine adjust
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On the top end of (L) is the scope mount. This mount allows for fine
adjustment
of the elevation. The scope itself is mounted on a piece of c-profile
aluminum, filed down to fit to the feet of the scope. The lower end of the
aluminum piece is held down by two screws with soft washers, and right
underneath is a short piece of wire (10-ga copper, with insulation, with
the ends poked into the wood) that allows this end to tip up and down
just a bit.
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On the other end of (N), the big knob pushes the aluminum (N)up from the
wood (L), and the
aluminum is held down by the spring, which goes from the top of the
aluminum C-profile, through a hole in the wood to the bottom, where it is
held by a nail. To prevent sideways slippage, I drilled a hole in the
aluminum, which rides over a pin sticking out of the wood. The total
vertical movement is only about 1/4", but this is plenty.
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| Finally I have a cardboard shield, which also serves
to cover up all those ugly holes in the middle of (L). I made 2 small
holes that cast a spot of light onto the cardholder, that helps you
find the sun. Thi piece is held in place with a rubber band. You can
see it in the photo
on the starting page.
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