diff --git a/bmtool/synapses.py b/bmtool/synapses.py
index 6bbe827..dd0ee50 100644
--- a/bmtool/synapses.py
+++ b/bmtool/synapses.py
@@ -55,10 +55,26 @@ def __init__(self, mechanisms_dir: str, templates_dir: str, conn_type_settings:
         self.other_vars_to_record = other_vars_to_record
 
         if slider_vars:
-            self.slider_vars = {key: value for key, value in self.synaptic_props.items() if key in slider_vars} # filters dict to have only the entries that have a key in the sliders var
+            # Start by filtering based on keys in slider_vars
+            self.slider_vars = {key: value for key, value in self.synaptic_props.items() if key in slider_vars}
+            # Iterate over slider_vars and check for missing keys in self.synaptic_props
+            for key in slider_vars:
+                # If the key is missing from synaptic_props, get the value using getattr
+                if key not in self.synaptic_props:
+                    try:
+                        # Get the alternative value from getattr dynamically
+                        self.set_up_cell()
+                        self.set_up_synapse()
+                        value = getattr(self.syn,key)
+                        print(value)
+                        self.slider_vars[key] = value
+                    except AttributeError as e:
+                        print(f"Error accessing '{key}' in syn {self.syn}: {e}")
+
         else:
             self.slider_vars = self.synaptic_props
 
+
         h.tstop = general_settings['tstart'] + general_settings['tdur']
         h.dt = general_settings['dt']  # Time step (resolution) of the simulation in ms
         h.steps_per_ms = 1 / h.dt
diff --git a/setup.py b/setup.py
index 326dc04..c0df332 100644
--- a/setup.py
+++ b/setup.py
@@ -6,7 +6,7 @@
 
 setup(
     name="bmtool",
-    version='0.5.6.1',
+    version='0.5.6.2',
     author="Neural Engineering Laboratory at the University of Missouri",
     author_email="gregglickert@mail.missouri.edu",
     description="BMTool",