Stay away from Seep as they aint as good as the peco. I have some seep on my layout and they break your heart. Peco you hit the switch and they do their job with no problems and are very reliable. You don't need a capacitor as a laptop charger at around 18v AC is enough power to throw 3 points at once. If you can get a 24v DC 5amp power supply this would be even better.