diff --git a/geoarches/configs/module/archesweathergen.yaml b/geoarches/configs/module/archesweathergen.yaml
index bb2126e..cf13336 100644
--- a/geoarches/configs/module/archesweathergen.yaml
+++ b/geoarches/configs/module/archesweathergen.yaml
@@ -12,8 +12,8 @@ module:
   uncond_proba: 0.0
 
   # what to learn
-  load_deterministic_model: modelstore/jzh-geoaw-m-seed0 # by default
-  learn_residual: pred
+  load_deterministic_model: modelstore/jzh-geoaw-m-seed0 # used to load preds if learn_residual="pred" and not loaded by dataloader from storage.
+  learn_residual: pred  # "default" to just learn [next_state-state], "pred" to learn residual of deterministic model.
   conditional: prev+det # or prev+det for instance
 
   # scales
diff --git a/geoarches/dataloaders/era5.py b/geoarches/dataloaders/era5.py
index 08b1d83..2fb393b 100644
--- a/geoarches/dataloaders/era5.py
+++ b/geoarches/dataloaders/era5.py
@@ -105,10 +105,10 @@ def __init__(
         """
         Args:
             path: Single filepath or directory holding files.
-            domain: Specify data split for the filename filters (eg. train, val, test, testz0012..).
+            domain: Specify data split for the default filename filters (eg. train, val, test, testz0012..).
                 Used if `filename_filter` is None.
-            filename_filter: To filter files within `path` based on filename.
-                By default, filters files based on `domain`.
+            filename_filter: To filter files within `path` based on filename.  If set, does not use `domain` param.
+                If None, filters files based on `domain`.
             variables: Variables to load from dataset. Dict holding variable lists mapped by their keys to be processed into tensordict.
                 e.g. {surface:[...], level:[...]}. By default uses standard 6 level and 4 surface vars.
             dimension_indexers: Dict of dimensions to select using Dataset.sel(dimension_indexers).
@@ -249,9 +249,9 @@ def __init__(
         """
         Args:
             path: Single filepath or directory holding files.
-            domain: Specify data split for the filename filters (eg. train, val, test, testz0012..)
-            filename_filter: To filter files within `path` based on filename.
-                By default, filters files based on `domain`.
+            domain: Specify data split for the default filename filters (eg. train, val, test, testz0012..)
+            filename_filter: To filter files within `path` based on filename. If set, does not use `domain` param.
+                If None, filters files based on `domain`.
             lead_time_hours: Time difference between current state and previous and future states.
             multistep: Number of future states to load. By default, loads next state only (current time + lead_time_hours).
             load_prev: Whether to load state at previous timestamp (current time - lead_time_hours).
diff --git a/geoarches/dataloaders/era5pred.py b/geoarches/dataloaders/era5pred.py
index 73e20d7..857f201 100644
--- a/geoarches/dataloaders/era5pred.py
+++ b/geoarches/dataloaders/era5pred.py
@@ -22,6 +22,20 @@ def __init__(
         variables=None,
         **kwargs,
     ):
+        """
+        Args:
+            path: Single filepath or directory holding groundtruth files.
+            domain: Specify data split for the default filename filters (eg. train, val, test, testz0012..).
+            filename_filter: To filter files within `path` based on filename.  If set, does not use `domain` param.
+                If None, filters files based on `domain`.
+            lead_time_hours: Time difference between current state and previous and future states.
+            pred_path: Single filepath or directory holding model prediction files to also load.
+            load_prev: Whether to load state at previous timestamp (current time - lead_time_hours).
+            norm_scheme: Normalization scheme to use. Can be None to perform no normalization.
+            load_hard_neg: Whether to additionallty load hard negative example for contrastive learning.
+            variables: Variables to load from dataset. Dict holding variable lists mapped by their keys to be processed into tensordict.
+                e.g. {surface:[...], level:[...] By default uses standard 6 level and 4 surface vars.
+        """
         super().__init__(
             path=path,
             domain=domain,
@@ -35,7 +49,7 @@ def __init__(
         self.load_hard_neg = load_hard_neg
         # self.filename_filter is already init
         if pred_path is not None:
-            self.pred_ds = netcdf.NetcdfDataset(
+            self.pred_ds = netcdf.XarrayDataset(
                 path=pred_path,
                 filename_filter=self.filename_filter,
                 variables=self.variables,