By moving the coil voltage wire to the high tap lug all of the relays and solenoid coils will work stronger not just the flippers. If the voltage is higher, the current in each coil circuit will be higher, thus a higher current arc on the switch that completes the circuit, making cleaning of pitted switches needed more often than normal. Sure the machine will play faster for awhile, but at what cost. Instead try a flipper rebuild kit and stronger flipper coils available often called hot coils.