https://www.abbeybiketools.com/products/lever-setter
With the Abbey adapter, a derailleur hanger alignment tool, and a protractor, you could probably satisfy your need with data-verified symmetry. There are probably cheaper ways to accomplish the same thing.
__________________
RIP 01/08/25...2022 Trek Supercaliber, 2018 Storck Fascenario.3 Platinum, 2018 Trek Procaliber SL Singlespeed, 2017 Bear BR1, 2003 Time VX Special Pro, 2001 Colnago VIP, 1999 Trek 9900 singlespeed, 1977 Nishiki ONP
Last edited by Eric F; 12-21-23 at 06:26 PM.