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Re: Bob Goethe's Mark 2 Navigators slide rule, test drive comparisons.
From: Sean Johnston
Date: 2019 Dec 15, 09:48 -0800

I’d like to share my progress on the Navigator’s slide rule:

parts in various stages

assembled comparison with K&E 4181

detailed shots

If anyone wants to build this, I can post the laser cut/etch files and write up some instructions.

I spent @ $100 for the parts.

- Sean

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