Eighteen year old TMCC layout, operation virtually flawless. Has five zones, each connected to a Powermaster. Control 32 switches via IC control boxes ASC 3000, now Lionel #ASC 6-14182. Track Power via three post war ZWs, switch power via Z. Switches are Ross, with NJI motors and rarely if ever fail. They may also be controlled, via pushbutton from control panel, but I rarely use buttons. Have replaced three Powermasters through the years; have two in reserve. Have five CAB 1s for use by multiple operators. Have many locos-- conventional, a handful of MTH, TMCC and few Legacy models. Considering converting to Legacy. Some questions: 1. If Legacy base/CAB 2 and Powermaster bridge replaces TMCC base, will I be able to operate above configuration? 2. Will I be able to use CAB 1s and CAB 2 simultaneously with this configuration? 3. As Powermasters "die", may I replace each with 1L Powermaster and continue to operate as configured with Bridge, or must I replace all original design Powermasters and remove bridge? Would I be able to operate mixed Powermasters (originals & 1 L) with CAB 1 or all five Powermaster 1Ls with CAB 1s, or do I need a CAB 1L? What is major advantage of installing Legacy Base/CAB 2 on my layout, as designed, versus Legacy 1L Base, 1LPowermasters? Remember, I want to run conventionally as well.Finally, Will CAB 1s be useable with either the Legacy/Bridge set up, a mixed Powermaster set up or Base 1L, Powermaster 1L arrangement?
You can sell the CAB1/BASE1 to recoup part of the expense. 
