PRRHORSESHOECURVE,
I agree with you and I also use the Side Receiver for the Z4K Transformer that opens up additional Conventional Track operations, I have 3 Z4k Transformers each having their own side receivers, opening up multiple train running options, which the ZW-L does not incorporate. Remember however getting these Z4K Side receivers is not always easy, and now they definitely are more expensive, due to their limited accessibility.
RGD/Dave