Another case where I'm amazed at how someone can take something simple and turn it into something ridiculous.
How did we get from shooting off the top of your hand to this?
Let me add that I know this is but one of many mechanical rests available, but it caught my eye when i was browsing the pages of the magazine.
From Bowhunter magazine, March 1990.

I remember seeing those advertised . Way past my pay grade in mechanical stuff
Bodoodle's were popular rests for compound bows. They worked very well.