Hi Ben, cool find, the nysthi sou utils octave folder appears to do this. Had to get out my magnifier to read the labels. lol However the atenuverters can’t do it alone. Remember we’re subtracting 1v if the input is over 1v, and subtracting 2v if the input is over 2v. 
Another trick I found is if you use the alikens hover tool while adjusting the scale you can get very accurate settings. For example setting it to 0.100 will provide 10% of the input at the output.
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