One thing though, The McDaniels unit draws current, aprox. 20ma. even though the receiver is off. I connected a heavy duty switch between batt. and glow drvr. ie. MPI capable of 10 amps. with deans ultra plugs instead of the deans plugs provided for the 9 cyl. they are ok for the 7 cyl. drvr. I measured the current from batt. to drvr. on the 9 cyl. and it was 9.3 amps when driving 9 glow plugs. If you choose not to deal with a switch just remember to disconnect glow drvr. battery at end of day.