So I was tired of seeing Lionel offer new features in O and not in S. I'm referring to WiFi, accessory remote activation and the Sensor track. I started to get motivated when my R20 Fastrack Remote/Command Control switches arrived. The command control was so easy to use with my Legacy control that I wanted to do more. I have some Fastrack AF Activation sections so I purchased the ACS2 and was able to wire those sections in order to remote activate them with my Legacy controller. Once I had that working I purchased the WiFi Legacy module. Once set up I was able to download my Legacy database to the iPad using Lionel's free Legacy app. It was actually easier to control the engine with the iPad app than with the Legacy controller. (I think they have an app for the iPhone as well). Finally, I wanted the sensor track but none was available for S. I went out and bought a O gauge sensor track and one AF Fastrack 5 inch section. I disassembled the O gauge sensor track, took the boards out, drilled holes and made some cuts with a dremmil tool into the Flyer Fastrack. I installed the board and finally installed the newly made Flyer sensor Fastrack. Low and behold it all works. So finally those sensors in my Flyer Legacy engines are now operational. So now we can automate Flyer as well as O people can with their engines. To be honest I am surprised that Lionel has not promoted that this was possible with American Flyer. If anyone has any questions please feel free to ask.