The biggest problem with the default Flux model is that it generates images with that strong AI look, probably caused by the distillation of the CFG. You should try some LoRAs for this, and also prompt the model to generate the rack that holds the letters.

Good point. I have a comfyui setup for it but its super basic right now just the diffusion model / clip loader / vae. Another thing you've probably noticed is that 99% of images from Flux tend to have that classic narrow depth of field look. I've seen people occasionally be able to get around it with pretty amusing prompt tokens like "instagram photo, selfie, gopro, etc." though.