Well, the build my build was based on was in turn based on the Fonitronik design which happens to include a reset button:
http://www.modular.fonik.de/pdf/SimpleDividerSCH.pdf
So you should be able to adapt that. You’d probably have to change the resistor assuming you’re on 12v not 15v like this schematic…but otherwise looks like you should be able to graft it right in:
