Pipe Out Sampler Settings Small

Of everything in RvTools' sampler-pipe family, this is the one for the other half of the ecosystem. "Pipe Out Sampler Settings Small" unpacks only four fields - sampler, scheduler, steps, cfg - and the telling absence is flux_guidance. No guidance knob means this pipe was built for the DDPM-style world: SD 1.5, SDXL, and every finetune in that family, where classic CFG still does the work and a flux_guidance field would just be dead weight.

Four fields is the minimal useful bundle, and honestly it's refreshing. On SDXL, sampler/scheduler is the choice that matters (DPM++ 2M Karras remains the safe default on SDXL and its finetunes), steps is the iteration dial, and cfg is the guidance you actually tune. Everything a KSampler needs, nothing it doesn't. If you're on a Pony or Illustrious merge and someone hands you a workflow full of Flux-specific pipes, this is the variant you'd swap in.

Mechanically it's the same relay as every other RvTools Pipe Out: one pipe input, the pipe passed through, each value split to its own output via a tuple unpack. It pairs with the matching "Pipe In" sampler-settings node that bundles the four values upstream. Feed it any longer pipe and the unpack throws a shape error.

The family's worth one paragraph of orientation, because there are a lot of near-identical names. The Flux variants add flux_guidance (and some add denoise, seed, or noise-injection knobs); the "Small" ones are the trimmed-down versions; this one is trimmed and Flux-free. When you see it in a workflow, the author is almost certainly sampling with an SD1.5/SDXL checkpoint and wanted the settings to ride a single wire without carrying baggage for a model they're not using.

Installing it

Ships in 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

• The four-field pipe is strict. This unpacker wants exactly four values. Wire in a Flux pipe (six fields) and execution dies with ValueError: not enough values to unpack. The pipe wire type is identical across the family, so ComfyUI won't warn you ahead of time.
• No flux_guidance is deliberate. If you need guidance-as-a-pipe-field, you're on a flow model and want the Flux variant instead.
• Deprecation. The RvTools v2 pack is unmaintained, superseded by ComfyUI_Eclipse per the README. Runs fine; plan migration for new work.