And if you want to know the difference between insulfog and electrofog (because I didn't have a clue:mrgreen: )
"The PECO Streamline Insulfrog electrical system is extremely simple, making if particularly suitable for the beginner or less experienced modeller. That said however, Insulfrogs are popular among experienced enthusiasts. Wiring instructions are almost unnecessary and, provided locomotives are fitted with correct current collectors, perfect operation will be achieved.
"Insulfrog (Insulated Frog) turnouts incorporate the minimum dead section due to the tapered frog rail design. Each PECO Insulfrog turnout is 'switched' so that only the track for which the blades are set is electrically alive (except OO slips & G-45 turnouts...obscure stuff).
"Electrofrog (Live Frog) The PECO Streamline Electrofrog system provides maximum continuous electrical pick-up assuring perfect smooth running even at very slow speeds -- provided of course, that current collectors and wheels are always kept clean. A layout using Electrofrog turnouts is slightly more conplicated to wire and therefore often suits the more experienced modeller. However, once the basic principle is learnt -- ie, 'current must always be fed to the toe end of each live frog turnout', the rest is not very difficult."