If you use the Bright White Post Flashers on the red posts they look awesome. Did two with orange flashers on the red posts and not to impressive. Installed 8 flashers on my firepower and love them. Plan on doing a few more.

The post flashers used on my Firepower.

First of all, your going to be sorely disappointed with the red flashers under a red post. They won't be very bright. Mine are bright white flashers. I installed 2 per sling. under the two bottom post. I know it's a pretty crappy video but if you play it again you will see the 2 flashers. If your doing a firepower, I just wired them two the sling coil. one wire to each side of the two outer coil lugs.. Didn't post a video, but I also put in a flasher behind and on each side of the stand up targets and two more farther up the playfield. These 4 total are wired to the pop bumper coils. pretty cool effect.
Jack

I haven't stepped up yet to a better temp controlled soldering iron. But my 15/30 watt iron from radio shack works just fine. Someday I'll upgrade... Not in a hurry.

Yepper. you got it right..

Mine are hooked to the slings by the flippers and flash just fine. Stupid question, but.. you are physically activating the slingshot right? They won't flash or light until you hit the sling.

You got these from cointaker? They are the best as far as I'm concerned. Love there leds. Also I was sent 1 defective one, called them, no problem. Sent me a new one plus an extra one just for good measure. Great people.
Jack

I can answer one for you. The post flashers are wired to either the slingshot coil or the pop bumper coil. On the firepower, it's a waste to wire to the PF flasher as it doesn't flash very much.