diff --git a/elements/neuron/presynapse.md b/elements/neuron/presynapse.md
index 23f0854..6fae244 100644
--- a/elements/neuron/presynapse.md
+++ b/elements/neuron/presynapse.md
@@ -17,17 +17,8 @@ PRESYNAPSE
   type: comprehension
 
   expand_comprehension: 
-   @VGCC-PRE: VGCC_PRE [ full: 10x, active: 5x, empty: 2x ]
-
-  tub_local:
-    _Vgcc_pre: TUB [ comp: @VGCC_PRE ]
-
-    _Ca2+: TUB [ full: 60x, active: 30x, empty: 0x ]
-    _Ca2+FullDev: TUB [ full: 100x, active: _Ca2+.full, empty: 40x ]
-
-    _Rrp: TUB [ full: 30x, active: 15x, empty: 0x ]
-    _Rp: TUB [ full: 30x, active: 15x, empty: 0x ]
-    _CaTraces: TUB [ full: 50x, active: 0x, empty: 0x ]
+    _Vgcc_pre: TUB [ expand: VGCC_PRE, full: 10x, active: 5x, empty: 2x ]
+    # serve al tuning
 
   tub_intricated:
     _NT: TUB [&ASTROSYNAPSE._NT] 
@@ -37,22 +28,31 @@ PRESYNAPSE
   context_intricated:
     *AP: CONTEXT [SOMA] ???
 
-  instantiate_container:
-    @: BEHAVIOR_PRE []
+  instantiate_tub:
+    _Ca2+: TUB [ full: 60x, active: 30x, empty: 0x ]
+    _Rrp: TUB [ full: 30x, active: 15x, empty: 0x ]
+    _Rp: TUB [ full: 30x, active: 15x, empty: 0x ]
+    _CaTraces: TUB [ full: 50x, active: 0x, empty: 0x ]
+
+    _Ca2+FullDev: TUB [ full: 100x, active: _Ca2+.full, empty: 40x ]
+    # serve al dev
+
+  instantiate_behaviour:
+    @: MAIN_PRE []
     @: TUNE_VGCC_PRE []
-    @: DEV-TUBS-PRE [] # da eliminare neuron-dev.md
+    @: DEV-TUBS_PRE [] # da eliminare neuron-dev.md
 ```
 
-### BEHAVIOR_PRE
+### MAIN_PRE
 
 ```Gen
-BEHAVIOR_PRE
+MAIN_PRE
+
+  type: behaviour
 
-  type: container
   activity_scope: !DAY
 
   snippets:
-
     # *AP
     @: ACCUMULATOR [snip: NTreleaseLow, RF: active 12x]
     @: ACCUMULATOR [snip: NTreleaseMedium, RF: active 9x]
@@ -322,7 +322,7 @@ TUNE_VGCC_PRE
   # contained_by: PRESYNAPSE non e' contenuto, si attacca.
 
   activity_scope: !DAY
-  type: container
+  type: behaviour
 
   context_intricated:
     - *TunePossible ( contained_by: DAY-N )
@@ -391,8 +391,8 @@ Voltage-Controlled Gated Channels: Qui per ora non gestiamo l'evoluzione della d
 VGCC-PRE
   type: comprehension
 
-instantiate_container:
-    BEHAVIOR_VGCC_PRE: CONTAINER []
+instantiate_behaviour:
+    BEHAVIOR_VGCC_PRE: behaviour []
 ```
 
 ### BEHAVIOR_VGCC_PRE
@@ -403,7 +403,7 @@ Voltage-Controlled Gated Channels: Qui per ora non gestiamo l'evoluzione della d
 BEHAVIOR_VGCC_PRE
 
   activity_scope: !DAY
-  type: container
+  type: behaviour
 
   tub_intricated:
     - _Ca2+ ( contained_by: PRESYNAPSE-BHE )