Pipe Out Sampler Settings Small (Flux)

This is the sampler-settings pipe that a sane person actually uses. "Pipe Out Sampler Settings Small (Flux)" unpacks exactly six fields - sampler, scheduler, steps, cfg, flux_guidance, and the pipe itself - and the thing it's not shipping is the whole laundry list of advanced knobs. No sigmas, no noise strength, no seed. It's the "I know what I'm sampling with, I just want the settings to travel cleanly" option.

Six fields is the sweet spot for Flux. You get the two identity choices (sampler, scheduler), the two numbers you tune (steps, flux_guidance), and cfg rides along for pipe-shape compatibility even though flow-matching Flux mostly ignores it. It's the pipe you'd feed from a fixed-sampler Flux setup where the seed lives somewhere else and you've decided not to fight noise injection on every run. If you want those extras, the NIS variant is the fully-loaded sibling; this one is the everyday carry.

Mechanically, same as the rest of the family: one pipe input, the pipe passed through, each field split to its own output by a plain tuple unpack. The values were bundled upstream by the matching "Pipe In" sampler-settings node; this node is a relay, not a generator. Wire the wrong pipe in - say, the nine-field NIS pipe - and the shapes won't match.

For a beginner the practical advice is short:

• sampler / scheduler - Euler-family sampler, conservative scheduler (beta or simple) for Flux. Keep Karras away from flow models.
• steps - Flux is fine at low counts; distilled checkpoints run 4-8.
• flux_guidance - the guidance knob. Moderate.
• cfg - present for shape, largely inert on Flux.

Installing it

It's part of ComfyUI-RvTools_v2. ComfyUI Manager: search "ComfyUI-RvTools_v2". Or:

cd ComfyUI/custom_nodes
git clone https://github.com/r-vage/ComfyUI-RvTools_v2

Restart ComfyUI. Dependencies (torch, numpy, Pillow, opencv-python, pilgram, pynvml, piexif) install through Manager; no models, no keys.

Where people get burned

• Six fields means six fields. This unpacker wants the Small Flux pipe exactly. Any other RvTools sampler pipe throws a tuple ValueError at queue time - all pipes share one wire type, so the mismatch only shows up when you run.
• Don't confuse it with "Small" (no Flux). The plain "Pipe Out Sampler Settings Small" drops flux_guidance for SD1.5/SDXL work. On a Flux pipe, the two are not interchangeable.
• Deprecation. The RvTools v2 pack is unmaintained; the README points to the successor ComfyUI_Eclipse. Works as installed, but new builds should check Eclipse.