diff --git a/src/nodeClass.js b/src/nodeClass.js
index 91a6098..16a467a 100644
--- a/src/nodeClass.js
+++ b/src/nodeClass.js
@@ -28,9 +28,8 @@ class nodeClass {
     this._setupSpecificClass();
 
     // Wire up event and lifecycle handlers
-    // this._registerChild();
     this._startTickLoop();
-    // this._attachInputHandler();
+    this._attachInputHandler();
     this._attachCloseHandler();
   }
 
@@ -45,7 +44,7 @@ class nodeClass {
       general: {
         name: uiConfig.name,
         id: this.node.id, // node.id is for the child registration process
-        unit: uiConfig.unit, // add converter options later to convert to default units (need like a model that defines this which units we are going to use and then conver to those standards)
+        unit: null,
         logging: {
           enabled: uiConfig.enableLog,
           logLevel: uiConfig.logLevel
@@ -68,20 +67,6 @@ class nodeClass {
     this.node.source = this.source; // Store the source in the node instance for easy access
   }
 
-  /**
-   * Register this node as a child upstream and downstream.
-   * Delayed to avoid Node-RED startup race conditions.
-   */
-  _registerChild() {
-    setTimeout(() => {
-      this.node.send([
-        null,
-        null,
-        { topic: 'registerChild', payload: this.config.general.id, positionVsParent: this.config?.functionality?.positionVsParent || 'atEquipment' },
-      ]);
-    }, 100);
-  }
-
   /**
    * Start the periodic tick loop.
    */
@@ -113,7 +98,7 @@ class nodeClass {
               // Register this node as a child of the parent node
               const childId = msg.payload;
               const childObj = this.RED.nodes.getNode(childId); 
-              this.source.childRegistrationUtils.registerChild(childObj.source ,msg.positionVsParent);
+              this.source.childRegistrationUtils.registerChild(childObj.source, msg.positionVsParent);
               break;
           }
     });
diff --git a/src/specificClass.js b/src/specificClass.js
index d1e0a28..eee7a8b 100644
--- a/src/specificClass.js
+++ b/src/specificClass.js
@@ -6,8 +6,25 @@ class liquidFlowHandler {
     this.config = config;
 
     this.logger = new logger(this.config.general.logging.enabled, this.config.general.logging.logLevel, config.general.name);
+    this.reactors = Array(2);
+    this.machines = {};
+    this.debit = 0;
     this.childRegistrationUtils = new childRegistrationUtils(this);
   }
+
+  updateState(timeStamp) {
+    effluent = this.reactors[1].getEffluent();
+    effluent.F = this.debit;
+    this.reactors[0].setInfluent = effluent;
+  }
+
+  handleChildChange() {
+
+  }
+
+  handlePressureChange(machine) {
+    this.debit = machine.measurements.type("flow").variant("predicted").position("downstream").getCurrentValue();
+  }
 }
 
 module.exports = { liquidFlowHandler };
\ No newline at end of file