diff --git a/autogalaxy/config/grids.yaml b/autogalaxy/config/grids.yaml
index 440f1d2a..bc0e3525 100644
--- a/autogalaxy/config/grids.yaml
+++ b/autogalaxy/config/grids.yaml
@@ -32,6 +32,7 @@ radial_minimum:
     NFWMCRLudlowSph: 1.0e-06
     NFWMCRScatterLudlow: 1.0e-06
     NFWMCRScatterLudlowSph: 1.0e-06
+    NFWVirialMassConcSph : 1.0e-06
     NFWSph: 1.0e-06
     NFWTruncatedMCRDuffySph: 1.0e-06
     NFWTruncatedMCRLudlowSph: 1.0e-06
diff --git a/autogalaxy/config/priors/mass/total/power_law_multipole.yaml b/autogalaxy/config/priors/mass/total/power_law_multipole.yaml
index 24819a3d..66f96df5 100644
--- a/autogalaxy/config/priors/mass/total/power_law_multipole.yaml
+++ b/autogalaxy/config/priors/mass/total/power_law_multipole.yaml
@@ -54,7 +54,7 @@ PowerLawMultipole:
       type: Absolute
       value: 0.05
     gaussian_limits:
-      lower: 0.0
+      lower: -inf
       upper: inf
   multipole_comps_1:
     type: Uniform
@@ -64,5 +64,5 @@ PowerLawMultipole:
       type: Absolute
       value: 0.05
     gaussian_limits:
-      lower: 0.0
+      lower: -inf
       upper: inf
\ No newline at end of file
diff --git a/autogalaxy/profiles/mass/__init__.py b/autogalaxy/profiles/mass/__init__.py
index 82e13250..b77f0ae2 100644
--- a/autogalaxy/profiles/mass/__init__.py
+++ b/autogalaxy/profiles/mass/__init__.py
@@ -28,6 +28,7 @@
     NFWMCRScatterLudlowSph,
     NFWMCRLudlow,
     gNFWMCRLudlow,
+    NFWVirialMassConcSph
 )
 from .stellar import (
     Gaussian,
diff --git a/autogalaxy/profiles/mass/dark/__init__.py b/autogalaxy/profiles/mass/dark/__init__.py
index a3938060..ace92041 100644
--- a/autogalaxy/profiles/mass/dark/__init__.py
+++ b/autogalaxy/profiles/mass/dark/__init__.py
@@ -6,3 +6,4 @@
 from .nfw_truncated import NFWTruncatedSph
 from .nfw_truncated_mcr import NFWTruncatedMCRLudlowSph, NFWTruncatedMCRDuffySph
 from .nfw_truncated_mcr_scatter import NFWTruncatedMCRScatterLudlowSph
+from .nfw_virial_mass_conc import NFWVirialMassConcSph
\ No newline at end of file
diff --git a/test_autogalaxy/aggregator/conftest.py b/test_autogalaxy/aggregator/conftest.py
index 1fc22660..e5b42cd8 100644
--- a/test_autogalaxy/aggregator/conftest.py
+++ b/test_autogalaxy/aggregator/conftest.py
@@ -36,6 +36,7 @@ def clean(database_file):
     value=True,
 )
 def aggregator_from(database_file, analysis, model, samples):
+
     result_path = path.join(conf.instance.output_path, database_file)
 
     clean(database_file=database_file)