diff --git a/elements/neuron/presynapse.md b/elements/neuron/presynapse.md
index bee65f4..eba40b5 100644
--- a/elements/neuron/presynapse.md
+++ b/elements/neuron/presynapse.md
@@ -137,7 +137,7 @@ TRACE
   
   // Tag se manca pre_budget, ma il rilascio di NT sarebbe stato di beneficio
 
-  Endourance_tag: INSTANTIATE [ snippet: accumulator, event: 12x, cost: 0x, context: *AP ] {
+  Endourance_tag: INSTANTIATE [ snippet: accumulator, event: 12x, cost: _pre_budget 0x, context: *AP ] {
     hypothesis: _pre_budget empty AND NOT deve esserci la possibilita di spikare e altri segnali come NO 
       action: [ _pre_endurance_tag increase ]
       else: None
@@ -145,21 +145,21 @@ TRACE
 
   // ########################## Fast Traces, NOT *AP ##########################
   
-  TracesAccLow: INSTANTIATE [ snippet: accumulator, event: 3x, cost: 3x, context: NOT *AP ] {
+  TracesAccLow: INSTANTIATE [ snippet: accumulator, event: 3x, cost: _pre_budget 3x, context: NOT *AP ] {
     hypothesis: _Ca2 emptiness
       action: [ _CaTraceLow increase ]
       else: None
   }
 
   
-  TracesAccMedium: INSTANTIATE [ snippet: accumulator, event: 6x, cost: 3x, context: NOT *AP ] {
+  TracesAccMedium: INSTANTIATE [ snippet: accumulator, event: 6x, cost: _pre_budget 3x, context: NOT *AP ] {
     hypothesis: _Ca2 mediumness
       action: [ _CaTraceMed increase ]
       else: None
   }
 
 
-  TracesAccHigh: INSTANTIATE [ snippet: accumulator, event: 10x, cost: 3x, context: NOT *AP ] {
+  TracesAccHigh: INSTANTIATE [ snippet: accumulator, event: 10x, cost: _pre_budget 3x, context: NOT *AP ] {
     hypothesis: _Ca2 fullness
       action: [ _CaTraceHigh increase ]
       else: None
@@ -179,13 +179,13 @@ MAIN
   
   // ########################## eCB Clearance, NOT *AP ##########################
   
-    eCBClearenceMedium: INSTANTIATE [ snippet: accumulator, event: 24x, cost: 3x, context: NOT *AP ] {
+    eCBClearenceMedium: INSTANTIATE [ snippet: accumulator, event: 24x, cost: _pre_budget 3x, context: NOT *AP ] {
       hypothesis: NOT _eCB empty
         action: [ _eCB decrease ]
         else: None
     }
 
-    eCBClearenceLow: INSTANTIATE [ snippet: accumulator, event: 48x, cost: 3x, context: NOT *AP ] {
+    eCBClearenceLow: INSTANTIATE [ snippet: accumulator, event: 48x, cost: _pre_budget 3x, context: NOT *AP ] {
       hypothesis: NOT _eCB empty
         action: [ _eCB decrease ]
         else: None
@@ -193,7 +193,7 @@ MAIN
 
   // ########################## Fast traces Clearance, NOT *AP ##########################
   
-    TracesClearance: INSTANTIATE [ snippet: accumulator, event: 30x, cost: 3x, context: NOT *AP ] {
+    TracesClearance: INSTANTIATE [ snippet: accumulator, event: 30x, cost: _pre_budget 3x, context: NOT *AP ] {
       hypothesis: NOT _CaTraceHigh empty
         action: [ _CaTRaceHigh decrease ]
         else: None
@@ -225,7 +225,7 @@ RECOVER
     // If even one of these "Near-Stop" conditions is met, the rate cannot exceed "Slow," regardless of the other two conditions. 
     // Rate: 0.00 – 0.25
   
-  RPShuttleLow: INSTANTIATE [ snippet: accumulator, event: 24x, cost: 3x, context: NOT *AP ] {
+  RPShuttleLow: INSTANTIATE [ snippet: accumulator, event: 24x, cost: _pre_budget 3x, context: NOT *AP ] {
     hypothesis: _CaTraceLow fullness OR _RP emptiness OR _Rrp fullness
       action: [ _RP decrease, _Rrp increase ]
       else: None
@@ -235,7 +235,7 @@ RECOVER
     // This covers cases where the signal is steady but the "piston" isn't firing at full speed, 
     // or where a high vacancy in the RRP (emptiness) forces a low signal to work a bit harder. Rate: 0.50 – 0.97
 
-  RPShuttleMedium: INSTANTIATE [ snippet: accumulator, event: 48x, cost: 3x, context: NOT *AP ] {
+  RPShuttleMedium: INSTANTIATE [ snippet: accumulator, event: 48x, cost: _pre_budget 3x, context: NOT *AP ] {
     hypothesis: ( _CaTraceMedium fullness AND _RP mediumness AND _Rrp mediumness ) OR 
                 ( _CaTraceHigh fullness AND _RP mediumness AND _Rrp mediumness ) OR   # signal boost
                 ( _CaTraceMedium fullness AND _RP fullness AND _Rrp mediumness ) OR   # supply boost
@@ -250,7 +250,7 @@ RECOVER
     // This represents an active synapse that hasn't reached its absolute peak because either the supply is only 50% 
     // or the \_Rrp isn't empty enough to create that "maximal vacuum" pull. Rate: 1.25 – 1.94
 
-  RefillGlutamine: INSTANTIATE [ snippet: accumulator, event: 24x, cost: 3x, context: NOT *AP ] {
+  RefillGlutamine: INSTANTIATE [ snippet: accumulator, event: 24x, cost: _pre_budget 3x, context: NOT *AP ] {
     hypothesis: ( _CaTraceHigh fullness AND _RP fullness AND _Rrp mediumness ) OR   # signal + supply
                 ( _CaTraceHigh fullness AND _RP mediumness AND _Rrp emptiness ) OR  # signal + vacancy
                 ( _CaTraceMedium fullness AND _RP fullness AND _Rrp emptiness )     # supply + vacancy
@@ -286,7 +286,7 @@ ADJUST
 
   // Increase: *VcggIncrease
 
-    VcggIncrease: INSTANTIATE [snippet: accumulator, event: 10x, cost: 3x, context: NOT *VcggIncrease ] {
+    VcggIncrease: INSTANTIATE [snippet: accumulator, event: 10x, cost: _pre_budget 3x, context: NOT *VcggIncrease ] {
       hypothesis:  
         action: 
         else: 
@@ -294,7 +294,7 @@ ADJUST
 
   // Decrease: *VcggDecrease
 
-    VcggDecrease: INSTANTIATE [ snippet: accumulator, event: 10x, cost: 3x, context: NOT *VcggDecrease ] {
+    VcggDecrease: INSTANTIATE [ snippet: accumulator, event: 10x, cost: _pre_budget 3x, context: NOT *VcggDecrease ] {
       hypothesis:  
         action: 
         else: 
@@ -323,14 +323,14 @@ DEVELOP
   }
 
     // snippet: *CaFullDecrease
-  CaFullDecrease: INSTANTIATE [ snippet: accumulator, event: 12x, cost: 3x, context: NOT *CaFullDecrease ] {
+  CaFullDecrease: INSTANTIATE [ snippet: accumulator, event: 12x, cost: _pre_budget 3x, context: NOT *CaFullDecrease ] {
     hypothesis: NOT ( full ) AND NOT ( empty ) 
       action: [ increase,  decrease]
       else: None
   }
   
     // snippet: *Ca2FullIncrease
-  Ca2FullIncrease: INSTANTIATE [ snippet: accumulator, event: 12x, cost: 3x, context: NOT *Ca2FullIncrease ] {
+  Ca2FullIncrease: INSTANTIATE [ snippet: accumulator, event: 12x, cost: _pre_budget 3x, context: NOT *Ca2FullIncrease ] {
     condition: ( empty ) 
       out_context: *RrpFullDecrease
 
@@ -343,14 +343,14 @@ DEVELOP
   RrpCheck: INSTANTIATE [ snippet: contextor, event: 60x, context: *fixed ]
 
   // snippet: *RrpFullDecrease
-  void: INSTANTIATE [ accumulator: RrpFullDecrease, event: 12x, cost: 3x, context: NOT *RrpFullDecrease  ] {
+  void: INSTANTIATE [ accumulator: RrpFullDecrease, event: 12x, cost: _pre_budget 3x, context: NOT *RrpFullDecrease  ] {
     hypothesis: NOT ( full ) AND NOT ( empty ) 
       action: [ increase,  decrease]
       else: None
   }
 
   // snippet: *IncreaseRrpFull
-  IncreaseRrpFull: INSTANTIATE [ snippet: accumulator, event: 12x, cost: 3x, context: NOT *RrpFullIncrease  ] {
+  IncreaseRrpFull: INSTANTIATE [ snippet: accumulator, event: 12x, cost: _pre_budget 3x, context: NOT *RrpFullIncrease  ] {
     hypothesis: NOT ( full ) AND NOT ( empty ) 
       action: [ increase,  decrease]
       else: None