@Aaron G. posted:I'm using the Lionel BT app now. My question was more about interference about what happens when I "throttle up" to 18 and whether that would override my App.
No - setting track power to 18 volts AC will not override the app or the remote (if so equipped). In fact, my recollection is that the manual for LC/+/2.0 engines says to set the power at 18 volts and then use the remote or App to command the engine.
LC/+/2.0 engines take their commands from the remote or the App, so increasing power by throttling up should have no effect on engine movement.
Also, forgot to add that the MTH Z-1000 would also make a good choice for an AC transformer; however, MTH is going out of business so repairs, supplies, etc. may be problematic. OTOH, it is generally a very solid and well performing transformer that should give you years of great performance.