After some testing, here are the recommended settings to use it.

Checkpoint: Z-Image-Turbo-FP32

Sampler: heunpp2:

Scheduler: linear_quadratic

Sampling Steps: 15

CFG: 1

Since it is trained on old, grainy pictures, it will produce grainy output, particularly on wide shots.

Too much grain?

Reduce weight by a bit (let's say to 0.6-0.5) and add a detailer like (Z Image Turbo Detailer by patrik 🐈) at relatively low to moderate weight (0.4-0.6).

Will update with more details as per need.