I am not the electronic design guy, but conceptually, you can cut the trace and parrallel connect the resistors such as the PS-2 unit.
As far as using the flywheel, knowing the gear ratio you could create a circuit to divide the ratio and pulse depending on the chuff count you want.
Again, I think the guts of the circuit maybe in the Lio ACREG. I have one opened I will list the components. G