Wanting to help a friend install flamethrowers on his rig. We'd rather build them than buy a kit. Figure its more fun and maybe cheaper that way. I'm thinking I've got it, but if something is missing, or ya have some advice please chime in. Plan is to buy a new "spare" coil, run a hot straight to it from the battery (fused of course) to the coil, will have push button in-line to activate. Connect the coil, ground it out on frame near mounting point. then just route the plug and plug wire off from it there into the exhaust about 6-8 inches back from the tip. We missing anything?