I wanted to be able to switch between loops without having to back up a train. I already had one set of Ross SG switches (really great) and wanted something that took up less length and would cost less than $10. I had one american flyer switch and lionel switch. I had previously installed the lionel switch in another location, but my lionel trains derailed at the frog. I decided to copy the movable frog of the Ross switches so I could use the lionel switch. I fabricated a frog from flat brass stock, a brass rod and some JB weld epoxy. I used three servo motors and an arduino for control. The switch does have a bit of the dreaded S curve, but all my trains run through it perfectly at any speed! Total cost was about $6 for the electronics, everything else was bits I had lying around.
