diff --git a/README.md b/README.md
index e6653a4..920bbca 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,10 @@ The KSampler from [Fooocus](https://github.com/lllyasviel/Fooocus) as a ComfyUI
 ## Nodes
 
 ### KSamplerWithRefiner
-Basically, two KSamplerAdvanced combined, therefore two input sets for base/refiner model and prompt. Additionally there is _refiner_switch_step_, which controls when the models are switched.
+On the surface basically two KSamplerAdvanced combined, therefore two input sets for base/refiner model and prompt.
+
+- _refiner_switch_step_ controls when the models are switched, like _end_at_step_/_start_at_step_ with two discrete samplers.
+- _sharpness_ does some local sharpening with a gaussian filter without changing the overall image too much. Useful range seems to go up to 20 or so.
 
 ## Note
-This patches basic ComfyUI behaviour - don't use together with other samplers. Or perhaps do? Other samplers might profit from those changes ... ymmv.
+There is some magic beyond just encapsulating two samplers into one. This patches basic ComfyUI behaviour - don't use together with other samplers. Or perhaps do? Other samplers might profit from those changes ... ymmv.