As I understand the current switch, it comprises 12 spark-gaps to decrease the current density through any single conductor, (switch) and already represents a problem with timing between the various switches. Increasing the number would further decrease current density through any one switch, but would likely increase the timing problem.
Unless & until a better mechanism is put in place to resolve timing issues between switches, I’m not sure that you’d want to increase the count of them.
As for lower voltage, I think the plan is to increase the voltage in order to increase the amperage, so lowed voltages probably could not be a goal.
My $.02
Pat
