I don't own much Postwar (a 2328 Burlington GP7 repainted into Santa Fe zebra stripes, an ABBA set of 2343 Santa Fe F3s, and 3 2500 series aluminum passenger cars relettered for Santa Fe) but my layout's power is all Postwar. A ZW powers the trains, a Type Z handles all of the accessories.
Nice..I see you have sound activation buttons as well. I use one on my main line for bell sounds on modern engines. Fendermain