Be careful and scan the ckpt file for ProtoGen 3.4.
Mine was flagged by Microsoft as a severe Trojan risk. Get the safetensor if you can.
I'm not sure if the file already had it when I downloaded from here, or if my system was infected.
Personally, I typically use a converter like https://huggingface.co/spaces/diffusers/sd-to-diffusers or https://huggingface.co/spaces/camenduru/converter to convert from CKPT to diffusers format.
Then, if I need a checkpoint file, I just use https://huggingface.co/spaces/camenduru/converter or https://github.com/jslegers/diffusers/blob/main/scripts/convert_diffusers_to_original_stable_diffusion.py to convert back to CKPT or safetensor.
AFAIK this eliminates any issues with CKPT files. Also, it allows you to reduce the filesize of every model to 4.25GB or 2.13 GB (for fp16), which allows you to save space on your harddrives and save memory, so you can run these models on Google Colab...
Thank you VERY much for that! I will look into the conversion process. Much appreciated.