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Click on the picture for a printable size. The Radio Shack Switch listed below may no longer be available. Use this Micro Switch obtainable from Amazon or other sources. Amazon Micro Switch

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The #6-32 screw boss OD measures .268".   A 1/4" standard Flat Washer's center measures .285", so it fits perfectly.
Stack enough washers to fill the 3/16" gap between the new plate and the Instrument Panel Extension.

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I used a 18Ga wire nail to drive the roll pin out.  I am disassembling for easier chrome plating.
This is the limit switch I will use.  All of these parts are tiny.

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Three amps (AC) is not a lot of load, but it's perfect for a 12-VDC relay coil.  I formed the roller arm to suit
my application.

Various pictures within this folder:
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