comfyui-workflows/models/flux2klein/COMMUNITY_NOTES.md

Hugging Face Community Notes

These are useful FLUX.2-klein community findings from Hugging Face pages that did not all ship clean standalone workflow JSON files, but still contain setup or optimization advice worth keeping.

Unsloth GGUF discussion

Source: https://huggingface.co/unsloth/FLUX.2-klein-base-9B-GGUF/discussions/1

What looked useful:

• At least one user reports a working 9B base path by starting from the official Comfy flux2 klein base 9b workflow and swapping the diffusion and clip loaders to GGUF-compatible loaders.
• The discussion explicitly calls out the text-encoder mismatch trap:
  • 4B uses Qwen3 4B
  • 9B uses Qwen3 8B
• The thread also suggests keeping ComfyUI very current; some of the reported matrix-shape errors appear to come from version mismatch or wrong encoder pairing.

Our take:

• Good sign that community users are already adapting the official workflows instead of reinventing everything from scratch.
• If you want a 9B GGUF branch later, this discussion is one of the better breadcrumbs for why it fails and how people are fixing it.

GuangyuanSD Blitz notes

Source: https://huggingface.co/GuangyuanSD/FLUX.2-klein-9B-Blitz-ComfyUI

What looked useful:

• The page is strongly oriented around low-step speed-first 9B usage.
• Recommended settings are very explicit:
  • 4-5 steps
  • CFG = 1
• The author says their environment was ComfyUI 0.11.
• The repo also mentions LoRA-adapter style application paths and Blackwell-oriented quantization variants.

Our take:

• Even though this page did not expose a clean workflow JSON in the fetched content, the settings are concrete enough to matter.
• If you try community 9B Blitz variants later, these are the first settings I would mirror instead of guessing.

ponpoke uncensored encoder

Source: https://huggingface.co/ponpoke/flux2-klein-9b-uncensored-text-encoder

What looked useful:

• It is not a workflow, but it is directly usable in ComfyUI as a replacement text encoder placed in the models/clip path.
• The author explicitly says to pair it with the official FLUX.2-klein-9B DiT and standard or GGUF-compatible loader nodes.

Our take:

• Not something to treat as a default, but worth remembering if you ever want alternate text-encoder behavior in a 9B setup.