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Here are a couple more interesting plans from the same 75-82 period, that I feel better about uploading, since I can control the quality of the upload. The first is a plan for a shop-built polisher. After uploading the tumbler and faceting machine plans I would be remiss if I didn't include this one. A tumbler does a good job but takes a long time, this vibratory polisher accomplishes the same in one quarter of the time. Looks complicated but it is not, an easy construction for what you get.
Here's a blast from the past. Remember spirograph, it was a popular toy from many many years ago, it came with different size plastic gears to produce a variety of designs. This plan is much more robust and will survive in the shop for, in addition to pen and paper creations, you can use a diamond point grinding wheel dresser to engrave metals for an outstanding finish.