No one has popped in so guess I will
Just want to make sure I understand correctly you have a existing layout with a Cab-1L command set (Blue case) 2 Z-4000’s that you are going to replace with ZW-L’s. And 48 DZ-2500 switch machines ( witch should be irrelevant as long as they work correctly). You also currently using 4 TPC’s.
For as I’ve stated above since you use TPC’s I assume your not standing at the transformers using the handles. You can actually remove the 2 Z-400’s and all 4 TPC’s and install only 1 ZW-L. The ZW-L has all PowerMaster (TPC) fictions built in for all 4 channels. The new ZW-L has a command binding post on the back of it that the Base-1L will connect to this will allow you to use the ZW-L in command and send the signal to the outside rails of all tracks with the 1 connection.
here’s a really good video on the ZW-L Mike Ragon did when he was still at Lionel
