If you're dealing with dynamicNode such as using:

var someNode = new umbraco.MacroEngines.DynamicNode(1046) in your template, it instantiates a DynamicNode like you'd expect, but then it doesn't function as a dynamic object
because it wasn't initialised as a dynamic variable [dynamic someNode = new umbraco.MacroEngines.DynamicNode(1046)]

Added a method to DynamicNode called NodeById which returns a new DynamicNode with the ID you pass, so you can call it off @Model
e.g. var item = @Model.NodeById(1046) will still function as a dynamic, even though it was defined as var

umbraco.MacroEngines.Juno/DynamicNode.cs

@@ -297,7 +297,10 @@ namespace umbraco.MacroEngines
                 return this;
             }
         }
-
+        public DynamicNode NodeById(int Id)
+        {
+            return new DynamicNode(Id);
+        }
         public int Id
         {
             get { if (n == null) return 0; return n.Id; }