ive had an HO set for eons. its as old as me well almost.  Recently i wanted to get back into trains but wanted an "O" scale.  Trains have come a long way.  I bought a Polar express complete set with blue tooth remote.  Not crazy about the Loco so i went looking for one i liked.  Found a 4 6 0 not realizing i have no way to run it.  While reading i found i need a train master command set with cab controller.  No such thing as a new one. Found older loco's ran with a variable transfomrer like my HO had.  but that means i need 2 tracks to run either train. I guess my question would be is there any way to run both engines on one set of tracks? Not at the same time of course. I noticed the LCS system in one of the other threads. Will that work for the 4 6 0 without any of the original cab system parts? Or can i just use the lcs and app for my phone? Please tell me i have not spent alot of money for nothing.  Thanks Mike