Based on my Centerfold Flux 5, trying to merge in Chroma and Krea.
It is not perfect but can make some nice pictures.
Q4 KM works fine in Comfy UI but not in Forge for example.
If you need the diffuser version: https://huggingface.co/Tiwaz/CenKreChro (not 100% tested yet).
You can try using it as low as 12 steps even if I prefer 30.