diff --git a/src/depiction_targeted_preproc/workflow/exp/plot_compare_peak_density.py b/src/depiction_targeted_preproc/workflow/exp/plot_compare_peak_density.py
index aaba086..6f0a436 100644
--- a/src/depiction_targeted_preproc/workflow/exp/plot_compare_peak_density.py
+++ b/src/depiction_targeted_preproc/workflow/exp/plot_compare_peak_density.py
@@ -6,11 +6,12 @@
 import vegafusion
 from typer import Option, Argument
 
-from depiction_targeted_preproc.workflow.qc.plot_peak_density import plot_density_combined
+from depiction_targeted_preproc.workflow.qc.plot_peak_density import plot_density_combined_full
 
 
 def exp_plot_compare_peak_density(
     tables_marker_distances_calib: Annotated[list[Path], Argument()],
+    table_marker_distance_uncalib: Annotated[Path, Option()],
     output_pdf: Annotated[Path, Option()],
 ) -> None:
     vegafusion.enable()
@@ -18,8 +19,9 @@ def exp_plot_compare_peak_density(
     table = pl.concat(
         [pl.read_parquet(path).with_columns(variant=pl.lit(path.parents[1].name)) for path in
          tables_marker_distances_calib])
+    table = pl.concat([table, pl.read_parquet(table_marker_distance_uncalib).with_columns(variant=pl.lit("uncalib"))])
 
-    plot_density_combined(df_peak_dist=table, out_pdf=output_pdf)
+    plot_density_combined_full(df_peak_dist=table, out_pdf=output_pdf)
 
 
 if __name__ == "__main__":
diff --git a/src/depiction_targeted_preproc/workflow/experimental.smk b/src/depiction_targeted_preproc/workflow/experimental.smk
index ed90050..1980553 100644
--- a/src/depiction_targeted_preproc/workflow/experimental.smk
+++ b/src/depiction_targeted_preproc/workflow/experimental.smk
@@ -34,10 +34,12 @@ rule exp_mass_list_preparation:
 
 rule exp_plot_compare_peak_density:
     input:
-        tables_marker_distance=expand("{{sample}}/{exp_variant}/qc/table_marker_distances_calib.parquet", exp_variant=exp_variants)
+        tables_marker_distance=expand("{{sample}}/{exp_variant}/qc/table_marker_distances_calib.parquet", exp_variant=exp_variants),
+        table_marker_distance_uncalib="{sample}/reg_shift/qc/table_marker_distances_baseline.parquet",
     output:
         pdf="{sample}/exp_plot_compare_peak_density.pdf"
     shell:
         "python -m depiction_targeted_preproc.workflow.exp.plot_compare_peak_density"
         " {input.tables_marker_distance}"
+        " --table-marker-distance-uncalib {input.table_marker_distance_uncalib}"
         " --output-pdf {output.pdf}"
\ No newline at end of file
diff --git a/src/depiction_targeted_preproc/workflow/qc/plot_peak_density.py b/src/depiction_targeted_preproc/workflow/qc/plot_peak_density.py
index de5f6b9..82b27fb 100644
--- a/src/depiction_targeted_preproc/workflow/qc/plot_peak_density.py
+++ b/src/depiction_targeted_preproc/workflow/qc/plot_peak_density.py
@@ -5,6 +5,7 @@
 import polars as pl
 import typer
 import vegafusion
+from KDEpy import FFTKDE
 from typer import Option
 
 from depiction_targeted_preproc.workflow.qc.plot_calibration_map import get_mass_groups
@@ -15,27 +16,57 @@ def subsample_dataframe(df: pl.DataFrame) -> pl.DataFrame:
     return df.sample(n_samples, seed=1, shuffle=True)
 
 
-def plot_density_combined(df_peak_dist: pl.DataFrame, out_pdf: Path) -> None:
-    n_tot = len(df_peak_dist)
-    df_peak_dist = subsample_dataframe(df_peak_dist)
+# def plot_density_combined(df_peak_dist: pl.DataFrame, out_pdf: Path) -> None:
+#    n_tot = len(df_peak_dist)
+#    df_peak_dist = subsample_dataframe(df_peak_dist)
+#    chart = (
+#        (
+#            alt.Chart(df_peak_dist)
+#            .mark_line()
+#            .transform_density(
+#                density="dist", as_=["dist", "density"], groupby=["variant"], maxsteps=250, bandwidth=0.01
+#            )
+#            .encode(x="dist:Q", color="variant:N")
+#            .properties(width=500, height=300)
+#        )
+#        .encode(y=alt.Y("density:Q"))
+#        .properties(title="Linear scale")
+#    )
+#    chart = chart.properties(
+#        title=f"Density of target-surrounding peak distances (n_tot = {n_tot} sampled to n = {len(df_peak_dist)})")
+#    chart.save(out_pdf)
+
+
+def plot_density_combined_full(df_peak_dist: pl.DataFrame, out_pdf: Path) -> None:
+    variants = df_peak_dist["variant"].unique().to_list()
+    collect = []
+    for variant in variants:
+        df_variant = df_peak_dist.filter(variant=variant)
+        dist, density = FFTKDE(bw="ISJ").fit(df_variant["dist"].to_numpy()).evaluate(2 ** 10)
+        collect.append(pl.DataFrame({"dist": list(dist), "density": list(density), "variant": variant}))
+
+    dist_min = df_peak_dist["dist"].min()
+    dist_max = df_peak_dist["dist"].max()
+    df_density = pl.concat(collect).filter((pl.col("dist") >= dist_min) & (pl.col("dist") <= dist_max))
+
     chart = (
         (
-            alt.Chart(df_peak_dist)
+            alt.Chart(df_density)
             .mark_line()
-            .transform_density(
-                density="dist", as_=["dist", "density"], groupby=["variant"], maxsteps=250, bandwidth=0.01
-            )
-            .encode(x="dist:Q", color="variant:N")
+            .encode(x="dist:Q", y="density:Q", color="variant:N")
             .properties(width=500, height=300)
         )
-        .encode(y=alt.Y("density:Q"))
         .properties(title="Linear scale")
     )
-    chart = chart.properties(title=f"Density of target-surrounding peak distances (n_tot = {n_tot} sampled to n = {len(df_peak_dist)})")
+    chart = chart.properties(
+        title=f"Density of target-surrounding peak distances (N={len(df_peak_dist):,})"
+    )
     chart.save(out_pdf)
 
 
 def plot_density_groups(df_peak_dist: pl.DataFrame, mass_groups: pl.DataFrame, out_peak_density_ranges: Path) -> None:
+    # TODO use kdepy as above
+
     # TODO merge these two functions
     df_peak_dist_grouped = df_peak_dist.sort("mz_target").join_asof(
         mass_groups, left_on="mz_target", right_on="mz_min", strategy="backward"
@@ -81,7 +112,7 @@ def qc_plot_peak_density(
             out_peak_density_ranges=output_pdf,
         )
     else:
-        plot_density_combined(df_peak_dist=table, out_pdf=output_pdf)
+        plot_density_combined_full(df_peak_dist=table, out_pdf=output_pdf)
 
 
 if __name__ == "__main__":