diff --git a/saqc/funcs/harm_functions.py b/saqc/funcs/harm_functions.py
index c11d95ae0bd5270e47ead54ab35053a838b3ed60..43b1d6b793bcbf4a0c7a2f3ef0bdd0b94e5a529c 100644
--- a/saqc/funcs/harm_functions.py
+++ b/saqc/funcs/harm_functions.py
@@ -608,7 +608,6 @@ def _reshapeFlags(
             # NOTE: breaks for non categorical flaggers
             .apply(lambda x: agg_method(x) if not x.empty else missing_flag)
             .astype(flagger.dtype)
-            .to_frame(name=field)
         )
 
         if method == "nearest_agg":
@@ -776,3 +775,60 @@ def _toMerged(
         return flagMissing(
             data, fieldname, flagger.initFlags(flags=flags), nodata=np.nan
         )
+
+
+@register('harmonize_shift2Grid')
+def shift2Grid(data, field, flagger, freq, shift_method='nearest_shift', drop_flags=None, **kwargs):
+    return harmonize(
+        data,
+        field,
+        flagger,
+        freq,
+        inter_method=shift_method,
+        reshape_method=shift_method,
+        drop_flags=drop_flags,
+        **kwargs)
+
+
+@register('harmonize_aggregate2Grid')
+def aggregate2Grid(data, field, flagger, freq, agg_func, agg_method='nearest_agg', flag_agg_func=max, drop_flags=None, **kwargs):
+    return harmonize(
+        data,
+        field,
+        flagger,
+        freq,
+        inter_method=agg_method,
+        reshape_method=agg_method,
+        inter_agg=agg_func,
+        reshape_agg=flag_agg_func,
+        drop_flags=drop_flags,
+        **kwargs)
+
+
+@register('harmonize_linear2Grid')
+def linear2Grid(data, field, flagger, freq, flag_assignment_method='nearest_agg', flag_agg_func=max, drop_flags=None, **kwargs):
+    return harmonize(
+        data,
+        field,
+        flagger,
+        freq,
+        inter_method='time',
+        reshape_method=flag_assignment_method,
+        reshape_agg=flag_agg_func,
+        drop_flags=drop_flags,
+        **kwargs)
+
+
+@register('harmonize_interpolate2Grid')
+def interpolate2Grid(data, field, flagger, freq, interpolation_method, interpolation_order=1, flag_assignment_method='nearest_agg', flag_agg_func=max, drop_flags=None, **kwargs):
+    return harmonize(
+        data,
+        field,
+        flagger,
+        freq,
+        inter_method=interpolation_method,
+        inter_order=interpolation_order,
+        reshape_method=flag_assignment_method,
+        reshape_agg=flag_agg_func,
+        drop_flags=drop_flags,
+        **kwargs)
\ No newline at end of file
diff --git a/test/funcs/test_harm_funcs.py b/test/funcs/test_harm_funcs.py
index e8944b6feb634160feb392a03ac652d279f5c5f8..bf5fc29ca801ae2e01f98fa94c7ebaaa4c53f96e 100644
--- a/test/funcs/test_harm_funcs.py
+++ b/test/funcs/test_harm_funcs.py
@@ -15,6 +15,10 @@ from saqc.funcs.harm_functions import (
     _interpolateGrid,
     _insertGrid,
     _outsortCrap,
+    linear2Grid,
+    interpolate2Grid,
+    shift2Grid,
+    aggregate2Grid
 )
 
 
@@ -287,7 +291,7 @@ def test_multivariatHarmonization(multi_data, flagger, shift_comment):
 def test_gridInterpolation(data, method):
     freq = "15min"
     data = (data * np.sin(data)).append(data.shift(1, "2h")).shift(1, "3s")
-    # we are just testing if the interolation gets passed to the series without causing an error:
+    # we are just testing if the interpolation gets passed to the series without causing an error:
     _interpolateGrid(
         data, freq, method, order=1, agg_method=sum, downcast_interpolation=True
     )
@@ -322,3 +326,16 @@ def test_outsortCrap(data, flagger):
         data, field, flagger, drop_flags=[flagger.BAD, flagger.GOOD], return_drops=True,
     )
     assert f_drop.index.sort_values().equals(drop_index.sort_values())
+
+@pytest.mark.parametrize("flagger", TESTFLAGGER)
+def test_wrapper(data, flagger):
+    # we are only testing, whether the wrappers do pass processing:
+    field = data.columns[0]
+    freq = '15min'
+    flagger = flagger.initFlags(data)
+    linear2Grid(data, field, flagger, freq, flag_assignment_method='nearest_agg', flag_agg_func=max,
+                               drop_flags=None)
+    aggregate2Grid(data, field, flagger, freq, agg_func=sum, agg_method='nearest_agg',
+                                  flag_agg_func=max, drop_flags=None)
+    shift2Grid(data, field, flagger, freq, shift_method='nearest_shift', drop_flags=None)
+